I am a very accomplished machinist, (many shops, now own my own business), with several manufacturing degrees, and getting into airguns lately, I was thinking the rifling process, which I have never seen before, was a cutting process, but it is more like a burnishing/forming process. I never knew the button existed. I would have thought it would take a lot more pressure to push the button through. You can learn something every day and the day you think you know it all is the day you have a lot to learn. :)

@markserbu

5 жыл бұрын

Congrats and good luck with your business! There are actually 5 different ways to do rifling: Button, broach, hammer forge, single-point cut, and ECM. Button is the fastest and easiest and requires the least amount of up-front equipment costs.

@brokeandtired

7 ай бұрын

@@markserbu crappy one could be fixed on a basic lathe as long as the hole was straight (even if angled) and steel blank was oversized compared to what is needed. Then just resquare the face and weld on the feed lip ramp or bolt it next to one.

@CameronMcCreary

5 ай бұрын

I would like to see Mark make the rifling buttons and the broaches.

@fuzzie567

4 ай бұрын

To EarthSurferUsa. Great idea for air gun to make it effective is the idea from the movie Cyborg with Jean Claude Van Damme where a paint ball gun with 20 to 24 ounce tank is converted into a manual revolver with either 4, 5 or 6 steel tube barrels and 3 indexed steel disc. The front end of paint ball gun resembles a Gatling Gun style look with choosing a 12 inch to 18 inch length of steel tube barrels to assemble all together with welding process to the 3 steel disc. For modified bullets you can make them out of 12L14 free machining steel. Taper the front end to a nice point of your choice of degree taper. Then keep the front of modified bullet solid while the back of bullet will be hollowed out for the air to project it from the barrels. Imagine the psi pushing out those 12L14 steel bullets from those paint ball gun tanks compared to those small Co2 that you put in a pellet gun. Then you can test that baby out on some pine wood slabs and fire away and enjoy. 😁

@alanmeyers3957

4 ай бұрын

I went from rc’s to airguns as well, most of your high end airguns use lother walther hammer forged barrels.

I started rifling my own barrel when I was 14... and you are right.... it is a rewarding experience.

Yup, all 10 fingers. (Or to be technical, 8 fingers and 2 thumbs.) You must have some amazing surgeons in that part of the world.

My grandfather used to make the barrels/ rifling for the Australian Owen gun in ww2. He then went on to make gear boxes, obviously loved precision.

@maxluburic657

3 жыл бұрын

Was he of German,Japanese or Croatian descent?!

@brada2354

3 жыл бұрын

@@maxluburic657 English/ Australian

@brada2354

2 жыл бұрын

@WrathMachine no mate rifling they used to pre drill then rifle it but the American's came over and said put the rifling bit straight through. Thanks for putting my late grandfather down he also used to make gearboxes owned his own company that made us well off, each to there own.

@brada2354

2 жыл бұрын

@WrathMachine what ever mate your technical manuals must be different, we used to have barrels kicking around but they are gone now, so I guess I have to take your word for it.

@brada2354

2 жыл бұрын

@WrathMachine gee he lived to 90 and died 10 years ago my father said as a kid he played with a non working owen that was rejected, maybe it had rifling when it shouldn't have anyway who makes a subbie without rifling I haven't found any information to prove your accusations, a name of a book would be handy but he made 500 barrels a month on a lathe. A 9mm without rifling who would have thought.

It makes me happy to see I'm not the only one that has a problem drilling straight holes :)...

@FourSeasonsHD

5 жыл бұрын

I was thinking that lathing the work piece now using the hole ends as the new centers might probably right the whole thing.

@bigb67676

3 жыл бұрын

@@FourSeasonsHD that's a process called "turning between centers". You are correct, that would true the outer diameter to the inner diameter. Afterwards you would have to face both ends though because they would be running out

@davidelzinga9757

2 жыл бұрын

I nearly always drill straight holes. Drilling them in the right direction, however, is another story

the Idahoan, makes rifled pistol barrels with a press and home made bit. He didn't fire and quench it, but it worked fine

@jukeboxhero1649

2 жыл бұрын

I feel like, ...like, you're sending microagressions. To anyone whom it may hurt. Yeah.✨🤣🤸

@MjCecil87

Жыл бұрын

If he didn't do that the barrel will wear out really quick due to it not being hardened.

Take out 2 opposing screws from your vice jaws to get that pocket you were talking about. For that button, put a socket on the end with the square end against the barrel and press the button into the socket to get it the rest of the way out. This was a cool video. I like your style because you know better and you explain that and what's the right way and what works. Looking forward to learning how to make my own rifling button.

sir , if u call this crappy u r underestimatin ur effort , it willl definetly deliver bulllets to their targets , you have given a glimpse , we in third world appreciate u r understanding and application, it is very genuine and of higher order.

@markserbu

4 жыл бұрын

Thank you. Perspective makes a big difference, doesn't it? Here in the U.S. we can just buy barrels but in much of the world they're very hard to come by!

Great that you showed the failings and problems that you ran into along the way. Thanks for this.

That was just great. I like how you compared the “Southern Engineering” method to having precision machines. Keep up the great work and thank you for sharing your hard-won skills.

Thank you Mark. I'm looking forward to the next installment(s). The idea of making a rifling button for yourself from (relatively) commonly available materials sounds very interesting. Machining and those types of processes have fascinated me since I was a kid, and yes, my Jr. High school and High School both had "real" shop classes where we used real industrial machinery. In Grade 7 we were turning, boring, threading, knurling, milling and (using a shaper) flattening real metal parts. I feel very sorry for kids in school today - wrapping them in cotton wool does them no favours.

@cameron760

Жыл бұрын

That would be fun asf, if I had an option like that I'd probably want to go to school ... :\

After watching the video of the BFG-50A on Forgotten Weapons, then seeing this, it gives a great perspective of what you must have gone through to create it. Thanks for showing this process!

@denveradventures589

Жыл бұрын

I watched the bfg 20 year history today then this popped up

I love how Mr Serbu seems cynical of the shit you have to go through to make stuff if lacking in resources, but at the same time, talk about how theres a lot of possibilities. "You can just do this holding in one hand and filing with one hand". This man, true engineer.

I was already giving up on making my own black powder gun, but watching your video I think I can. Thanks.

This guy is awesome. This is called thinking outside the box and it's very inspirational for educational purposes. Thanks

Just awesome someone has taken the time to show home builders how to do so.

Lathe works the best....been there done this......aaannnd CNC's rock...you can make these for your friends and family. Pass em out at Christmas and family reunions.

Health and safety must be having a fit watching this! BUT WHAT A GREAT VIDEO and it's a good reminder to all of us about ..the things we all do wrong in the workshop

Im a mech engineer, formerly a cnc machinest, iron worker, classic euro car performance shop do-it-all,the literal real life macguyver. and according to my s.o. the fixer of all things. I do it well. Very very well. I waited all the way through to comment here. This was a great example of how this works. I see a bunch of comments saying they are a machinest etc blah blah. Also a firearm enthusiast. Most everything in the safe was built by yours truly. Lotta people haven't seen this ever let alone have a rifling button. Here fellas. This is concept and explanation. Would I ever fire that? Hard nope. This is a GREAT illustration of the concept and an illustrative example of how rifling (mostly) works. At the end of this, mark has accomplished many things we have not. Harbor freight is my jam. Prominent media personalities showcased Cars I built using quite a few HF tools🤣 knowing what your doing cannot be replaced by tools a home mortgage is equal to to fill a single toolbox. (To an extent) this shows you. Yes, it's possible. Not ideal unless your the kind of person with hundreds of thousands of dollars of high level machinery. If you know what your doing, BET your ass this can work🤣 I love it Mark. Diy, basic and cheap tools Because that's what everyone realistically is going to be working with. It's a gem buddy I love doing more with less

If I didn’t know who Mark Serbu is, this video wouldn’t be nearly as fascinating.

Thanks for setting up Edwin. That guy is hilarious.

You build some awesome guns but everything about this video is sketchy as shit. Which means I can for sure do it at home!

@AldoSchmedack

5 жыл бұрын

bucketsof lead Ata boy! Love that spirit!

@HaqqAttak

5 жыл бұрын

That sort of seems like the center of the stock. (bunch of scribbles that don't come to anything resembling a point) Good enough, whatevah. It don't mattah, none a dis mattahs.

@EndingTimes0

5 жыл бұрын

@@HaqqAttak the center is the area that appears in the middle of all the marks.

@HaqqAttak

5 жыл бұрын

Machining is usually a little more precise than that squid.

@markserbu

5 жыл бұрын

On this particular part, the OD will be turned while it's held between centers. That means the location of the hole doesn't matter a bit, as long as it's not so far off that the OD won't clean up.

Very encouraging! Thanks Serbu. You are a gentleman and a scholar. Thanks for breaking it down! Bringing the power to the people

I have watched probably tens of thousands of KZread videos and this is by far the best one the best edited one that I've ever seen! Extremely informational especially whenever you pull up the Harbor freight's and whatever other place you buy them from most guys simply don't say a damn thing is completely quiet which I think is hilarious. Great job dude

"These calipers are messed up..." Literally my experience with every set of calipers.

@ronald209

4 жыл бұрын

It helps to know the correct way to use "PRECISION INSTRUMENTS", they're not hand tools for idiots.

@cavemanjoe7972

4 жыл бұрын

@@ronald209 I've always wondered why the threads on these little Mitutoyo C-clamps are so fine, with graduated markings.😂

@angrydragonslayer

3 жыл бұрын

@@ronald209 my own calipers are fine after 4 years Every other set i get a hold of aside from brand new ones though....

@evoxis1058

3 жыл бұрын

Every set at my machine school is messed up aside from the teachers. It's fixable but we're not supposed to adjust them

@josiahtheblacksmith467

3 жыл бұрын

@@ronald209 helps if you don't use them as a scribe or over tighten them while trying to gauge a piece.

Watching stuff like this, gets the gears moving in my head.....this caint end well...lol. thanx Mark love the vid Hope ya all fared well thru Irma

I've decided that this will be my school science project next week

Half of me is like "YAH! you can do anything and don't have to have expensive tools!" and the other perfectionist half is like "WTF are you doing?????" lol

Made a video full of... What NOT to do!! Love it. This is how we learn. 😂Always comes down to a hammer... and beating on it!! My skill set.

I'm so glad to see that this step is simpler than I have been making it. Now if I can just make a rifling button that won't deform in the blank...

In my experience, to drill a hole through the center of round material, I put the drill bit in the vice on the drill press and the material to be drilled in the chuck on the drill itself, it will drill the hole dead center every time, no special tools, lathe, etc, just go slowly an flush with lubrication and voila! A perfect, centered hole in your round stock, with the right chuck on your drill press, you can drill octagon or hex stock just the same, hope this makes sense, it works like a charm, db

Ream it after you drill it, while it’s still on the drill press locked in the vice. Cutting oil really helps 😊

@danielmclellan7762

3 жыл бұрын

Lol

@MarceloPereira-ll4go

3 жыл бұрын

👏👏

love what you're doing with these vids Mark!

This should be called “everything you should never do”

@EarthSurferUSA

5 жыл бұрын

Quit being a union worker child,--and get the damn job done for a change,----- of diapers. lol

@deviantsid18

4 жыл бұрын

FBI has joined the chat

@unchosenid

4 жыл бұрын

All he needs to do is add "Here, hold my beer"....

@yanghe6958

4 жыл бұрын

XDXDXDXD

@RagnarOdinson

4 жыл бұрын

😂Yeah. But still full of WAY more good info than the average KZread vid. I can dig it👍🍻. HA!

Thanks for doing it with simple tools. And, thank you for showing us the right way!

Mark you're the most self deprecating craftsman ever hahaha... you remind me of a more advanced version of myself.

Love these types of vids! Especially from someone who has the skills and machines you do. Salt of the earth regular guy stuff but still very informative. Keep it up!

honestly love this, just brute forcing everything with the cheapest tools possible. though crude, its very good information. more entertaining than watching a cnc machine spit out parts in 5 minutes.

@nonononatsee8514

3 жыл бұрын

250$ Rifling button

This video is so awesome! Thank you for doing it the "quick and dirty" way of doing it, because you proved that you can Macgyver a gun out of nothing to protect yourself from the ever present criminal element that's out there ! Thank you again, sir. You got a viewer from now on !

Just what I wanted to learn, thanks for sharing your knowledge Serbro

You keep on saying what I’m not supposed to do but you keep on going. I’m glad you did. It’s fun to see homemade gun parts. I just love it

I am from Scotland in the UK. We have a saying here. "Rough as a bear's arse". I would guess that you'll understand, but as long as it keeps the bad chaps away, please continue.

@pir869

4 жыл бұрын

Is it no "BADGERS ARSE",might jist be colloquial.

@danmackintosh6325

3 жыл бұрын

@@pir869 any arse that's rough and to hand will do, any port in a storm aye?

@pir869

3 жыл бұрын

@@danmackintosh6325 ???

@danmackintosh6325

3 жыл бұрын

@@pir869 I was inferring bear/badger who cares, all arses are pretty rough if you think about it... (probably came over a bit different mind, I'm not good at wording shit)

@Thousand_yard_King

3 жыл бұрын

Scotland forever.

This is brilliant! 😄😄😄. Proper apocalyptic fun workshop 😂

Thanks Mark love the simple way you rifled that barrel!

Watched to see your process for rifling. (15 years in aerospace, and theres always something to learn, thank you for the video, I don't think I am sharing anything you don't know, but I think this would be useful for the average viewer) A few tips I have picked up. Reaming with hand tools works better then tightly constrained, more flex in your tool holding set up the better so it can guide itself to the average and the less it binds, but you do need to use a reamer made for hand tools to fully utilize this, and make sure you have at least .005 (inch) to remove, and not more then .007 ~ish per inch on hole diameter. And of course ypu need to use the guiding brushing thay goes in the little hole in the end, they are sold separately. In my experience, always refer to the machinist bible, don't trust a random commenter experience haha. I have used this principle to fix holes that where undersized on 1/4 million dollar jigs, saved the entire assembly after it was welded and too big to fit in our football field sized milling machine. I got a raise for my efforts so I am more then happy with my results. They where within +/-.0001 and the tolorance was -.0002 +.0001. Takes practice to get excellent results, if I had not been the general purpose "fixer" in the shop thanks to my hand techniques and flexibility I would not have pulled that off, but I think a garage shop could figure it out with a dozen or so practice holes. Some tips for getting a through hole centered and straight, drill out with an undersized drill first. Drill from both sides first, and dwell when your at the bottom, size up through three drill bits if you can but use at least two. Only the first needs to be drilled from both sides. Again, it was really awesome to learn from your experience in rifling, I will utilize it well, I am surprised that buttons do not require a twisting punch to push through, that was cool to see, I would like to know if you have tested for drunken twist?

fun fact: those agressive tooth'ed pads on a vise are held on with screws because they're made to be reversible. there is a toothed side, and the other side is smooth for when you don't want to put a texture on your workpiece.

@jdog4534

5 жыл бұрын

I thought the same thing until I tried it a couple weeks ago. The holes on the other side aren't countersunk for the screw heads. ..and I had to use my impact driver to bust them loose.

@jimandaubz

5 жыл бұрын

Not quite, but close. You can countersink the reverse side if you want, or buy a set of soft jaws for a few dollars. Personally I think buying (or making) the soft jaws so cheaper since your about to ruin a counter sink if you choose to make reversible jaws

I did one barrel here in australia(supid gun laws)i spent 8 hours driving a 9mm button down a stainless barrel with a hammer n rod It worked perfectly It was a 500mm barrel

@johnnytower6169

3 ай бұрын

A guy was done last year in Western Australia for making barrels (and the rest of various sub machine guns). The judge accepted it was a case of collectors curiosity but warned that it was very serious and wouldn’t be tolerated again, then let him off but now that his zero tolerance stance has been noted in the judgement I don’t think anyone else will be so lucky

Really interesting to see the bare minimum approach. The quiet metal playing throughout in the background is a nice touch too, that's what my shop would sound like.

To get a perfectly centered hole you need to spin both the part and drill bit...although your method of doing this in a home shop with limited tools is very good. Nice job

@joelee2371

6 ай бұрын

This operation is typically done on a metal lathe where the workpiece is chucked in the headstock and rotated against a stationary bit chucked in the tailstock; only one part, tool or work, needs to rotate.

Primitive Pete. So simple, even a Cave Man can do it.

I just found this video and man, I hope your Safety Squints were in "angle grinder" mode for this project! Loved it.

Thanks, appreciate your effort I know you didn't expect to hear this but good job Your effort showed all of the different complications. That one comes in to when you're trying to do it at Hawk by hand❤😊 Keep up the good videos. Thank you for showing people that this is doable, but not exactly easy🙂👍

As a school-trained Master Gunsmith, this video gave me flashbacks of training apprentices. Thanks.

What u came here for is at 24:40, real action.

@ElTerrible666

6 жыл бұрын

Edwin Sarkissian that was in the last video.

@lostandfound3588

5 жыл бұрын

"real action" laughing out loud

@Swenteno

4 жыл бұрын

No 24:55

@johnakridge2916

3 жыл бұрын

Edwin 👍 Glad to see you here Man

only man brave enough I've seen to hold your hand that close to a cutting wheel

Super cool I learned a lot from this video. Thank you for sharing

One thing not mentioned - after the button is pushed through there are very high hoop stresses in the material. The material needs to be stress relieved before machining. Also important is the material properties, ie: hardness. Typically barrel material is between 28 and 32 Rockwell C when drilled, reamed and rifled. Then it needs stress relieving before machining. Materials of lesser strength will not stand up to anything much over .22LR.

@dennisyoung4631

Жыл бұрын

Sounds like 4140 pre-hard, or, perhaps “ETD-150” - a free-machining flavor of the same… (Just got done turning stub-axles of the same for a bike trailer. Pressed and pinned into an .058 thick tube of 3/4 4130 tubing…)

@Parents_of_Twins

6 ай бұрын

Stainless is a fairly common rifle barrel material does it fall in this range? I've got 6-8' of 1.5-2" stainless I was thinking about using to make a barrel. Might have some other stuff as well not sure. Bought a bunch of metal a couple years ago and have been working on figuring out how to get it home since. I just finished rebuilding the engine on a rough terrain forklift that I'm planning on using. I know one pies as 6-8" in diameter and at least 6' long and there is are other pieces like that hence the forklift. It's all in behind a guy's house and it's soft back there as well and he doesn't want his yard torn up which is why it has taken so long, think it's between 3-4 tons in total.

Man, I absolutely love your style :-D This reminds me of the sketchier things I've done with the press. Would have been nice to see it rounded off with a pipe cap breech so you could bring things to a close by popping off a .22

I love that your dial caliper is in the same working condition as mine. At least it works as a divider if you hold it JUST right.

Thanks Mark, you've unlocked the secret to home barrel rifling. I'm old school just like you....

Looking forward to the rifling button video. I just finished putting the GB-22 drawings into my cad/cam software. Material arrived yesterday so my build will commence as soon as a machine opens up.

next video : how to make Apollo 666 from the shoe box and 3 yards of duck tape

Very cool. Looking forward to trying this

You crack me up, good job, thanks!

Holy crap. Rifling a gun barrel on your own. I realize it’s harder than it looks but it can be done is what you’ve shown. I’m just smiling and scratching my head. Thanks for passing on this knowledge. Seriously

@phillipgaley4416

5 жыл бұрын

Why not simply by different sizes of barrel liners? They're made to re-do a worn-out barrel, . . . Ream the barrel; heat the barrel; chill the liner; and slip it in, . . . or, for no heat, ream close, and red Loctite, . . .

that subtle jab at royalnonesuch was spot on :p

I’m watching this video after a few beers. Enjoying it, didn’t catch who made the video. About 3/4 of the way through I’m thinking to myself, this guys voice sounds very familiar. Then I think this guys sure sounds a lot like Serbu. Then I check who makes it. Lol. He’s a one of a kind. Good stuff

Who let the boss in the shop unsupervised. lmao 😂

Glad to know it’s possible to do it on a budget, I’ve wanted to make a .22 break action pistol out of some railroad spikes I have but rifling was keeping me from it. Now that that’s not holding me back and I have access to a lathe and mill I can probably have the whole thing finished in a few months.

This was a osha night mare lol loved it. Safety Sally's somewhere were screaming.

@EarthSurferUSA

5 жыл бұрын

If you ever get fired from a shop, and you want to get even, sick osha on them with complaints that you know are true violations, (and every shop has them). I wish I could have seen the look on the bosses faces when they found out it was me. They thought they hired an amateur and tried running me through their boot camp routine. I didn't take it, I got fired, and they got burned. :) Safety Sally? Before my time I guess, but sounds like your other Mother. That is government for you, treating grown adults, (who pay for their existence), like elementary kids, when they aren't adult/functional enough to make a dime in our free market. Is there a Safety Sally coloring book too?

@markserbu

5 жыл бұрын

@@EarthSurferUSA We had a disgruntled employee do that to us once. Luckily we don't have enough employees for OSHA to have jurisdiction over us.

@BacklTrack

3 жыл бұрын

@Robert Slackware ..

@RememberPele

3 жыл бұрын

@@EarthSurferUSA sounds like you're a giant twat

@Evan-is5lc

3 жыл бұрын

@@EarthSurferUSA So you think people are smart enough to control their own safety but chose to call OSHA on a previous employer? After getting fired for knowing too much for their training? OSHA holds a pretty high seat on list of worthless pricks; You are higher on that list.

not only good content, the best background music on the interwebs.

Loved the video. Thank you for being adventurous. I love making things from what I have lying around, understand how it works and do it again.

Watching you wrangle that death wheel had me puckering.

@markserbu

6 жыл бұрын

It's ok...I'm a professional. ;-)

Hahaha "you got a dart in your neck" what!?" Your crazy man, I like you"

Makes me appreciate the old old school blacksmith out there in the dirt knocking it out

Maybe someone already said, but what I do for a better "center drill", i use the method of I need to remove a broken off fastener down in a hole. But still a hole in a block of wood near the same outer diameter of the would be barrel. Drill with a press, then lower the drilled block. Place would be barrel in hole, hold with vise grips or whatever you choose, the drilled holes in the block will hold the barrel in alignment. While holding the barrel with grips, drill the smaller home in the barrel. That will give you a MUCH better aligned hole.

Fn great video! Love the special voice slow down, thanks for making videos all of us can understand...

They should teach this in schools.

@PP-uv1kw

3 жыл бұрын

they do .... oh.. not government schools

Thanks Mark. Now I’m ready to make my own RN50...

By the way, I really like this, it is so much fun, to see you working, cant wait to see part two, hooo, hooooo !

" remember, never ream with a hand drill" *meanwhile continues to ream with a hand drill* lol great video 👍

A very wise old machinist I apprenticed under once gave me a piece of sage advice " any problem in life can be solved with the proper application of either pressure, lubricant,or both."...I guess it does apply to gunsmithing as well

@d3athsquad843

5 жыл бұрын

Now say that line with a twist, just like how Rodney Dangerfield would've.

@rogerdodger7634

5 жыл бұрын

D3atH SquaD What can I say, i don’t get no respect. R Dangerfield

It's fun. That's why we do things like this ☺️. I've made cross bow's,black powder pistols, black powder dubbel barrel shot gun, band saw saw mill powered with a twin cyl snow mobile motor.lotsa wood stoves. Far too many things to mention. I don't know why other than It's fun. 😊 Good video,never seen a rifling tool like that.thanks for your time

Now you gotta do home shop headspacing. Ha goodluck! ;)

“It’s going in now, thank god!”

So is this the 3.0 version?

Shop class? Extinct, it seems. Thanks for this!

Much love. Love your work. Subscribed.

chuck that in a lathe and have a tapered barrel! will look great! follow your bore!

"....spin it between a couple of nails and grind it...." HAHAHA I just might have to actually try that one day to prove that it can be done, because the theory is sound.

@RedneckBallistics

3 жыл бұрын

I've used a drill press and nails as a poor man's lathe and live centers... It worked. Not well.

Amazing. I love this so much showing home made guns is great. Thanks.

I'll tell you what mate, your content is fascinating! Top man and good job done ✔️

Omg I just wanted to jump through the phone and help you. You got a shop full of nice tools and don't know how to use any of them.

@markserbu

5 жыл бұрын

Damn, I wish you could help me! I just have NO idea how to use all these nice tools!

@heatherrrenea

5 жыл бұрын

Bahahahaha! Lego eggo has no idea. He must not know who you are.

Love this dude's attitude

This man flexing by throwing precision out the window.

I had to go back in time to find this gem of content 😮

nice for handgun barrel.....I'd like to see a 20" rifle..... :)

Short and sweet. But what about long barrel? Got Gun Drill machine? Nice shop you have there. I hope to expand into aluminum billet parts, and get a Haas or two also. BE A GOD OF ,MATERIAL GOODS!!! ")

a gun maker sharing how to make homemade guns, I love this man.

You can get thinner cut off wheels for your cutoff tool. I worked in the Plastics injection molding industry for 21 years and Still have a few ejector pins never bought any though. The really thin ones can be ground to a fine point and used like a needle. You can also make firing pins with them. Over the years I built a few barrels without rifling for .22 blank perimeter alarms. Used the ejector pins as the firing pin. I would cut a small groove in ejector pin on the lathe to hold my clip, and then turn down part of the head of the pin and make the firing tip. That way I could insert a spring in the tube and then my ejector pin. I would make a screw on tip that the blank would fit in and threaded up into the tube. Had quite a bit of fun with them. Mine wasn't fancy or anything ,but were useful. And the blanks I used were actually store bought for a nail gun.