Really awesome info I wish I would watch your videos a few years ago would saved me lot trouble and money

I have been very happy with the ASC Colt SMG pattern magazines. At least since I got the LULA loading tool for them.

I said it before and I don't mind saying it again. THANK YOU. I had some difficulty putting my fors ar9 together. Then found your website. With the knowledge you share putting the next 3 ar9's together was easy and no stress. All 4 of our PCC'S have the same colt mag adapter as you show in the video. This video was well done, provided concise information and will be of great benefit to other ar9 enthusiasts who are just starting out.

@Blowback9

10 ай бұрын

Glad I was able to help!

I like this style of adapter. Historically it was designed by a Colt engineer and Colt used it that design breifly but went back to the pin in blocks. Lots of companies make this design and even more sell them. The kind I like the most is from Rock River Arms.

Very cool since I am building my first AR 9

@Blowback9

10 ай бұрын

You may find this helpful: blowback9.wordpress.com/2021/04/06/a-9mm-ar-build-parts-list/ Good luck!

Great video as usual

@Blowback9

7 ай бұрын

Appreciate that - thanks!

I got the same colt adapter, I had to bend the ejector just a little for the gun to eject how I wanted. No hiccups after that.

@ARP_king5.56

4 ай бұрын

How bro ? Video?

@tyaj694

4 ай бұрын

@@ARP_king5.56 the ejector rubs against the bcg a little so, you just need to bend it a few mm with a tool to clear the bcg. It’s fairly easy to do. The pro to this adapter is the last round bolt catch.

Picked up a subscriber today. Thanks for the video. My adapter is a bit different, older I believe. It has only a single set screw near the top. I think I am going to drill a couple of holes to put the lower set screws in place.

@Blowback9

4 ай бұрын

Be careful not to drill all the way through - it's easy to do! Just a notch in the inside of the magwell will do the trick.

Excellent video

I have the same adapter. However it does not mount the same. I had to remove the mag release to slide it in. Then reassemble the mag release. Bought about 8 years ago. So maybe its a older design. I have not had any problems at all. Love your channel by the way.

I am in 100% agreement with you on the advantages of a Colt style mag over Glocks. Used to be you could not find 10 round Colt mags but now you can. I did try a set-screw type of insert and I think it's mandatory (pretty much) to dimple the metal with a drill bit to get a good bite. I tried a set-screw type from KAK and it just did not fit well - a lot of air between the side of the magwell and the insert. Perhaps another brand would have been better. I ended up getting a Hahn Precision insert that goes in from the top (have to remove the bolt catch). I also ended up using a CMMG ambi magazine release because it goes deeper into the magazine to hold it in place (CMMG seems to like expensive niche items). The MILSPEC release just barely holds the mag in place due to the added thickness of the adapter.

Another awesome video! I can hardly wait to get all the parts I ordered after watching your videos so I could make things right with my builds! You cost me A LOT of money! ;) (But money well spent!)

Great video! It seems that if you use an adapter, colt mags are the way to go. If you use a dedicated lower, either works well.

@Blowback9

10 ай бұрын

Absolutely! For Glock mags I tried a Glock adapter first. I sent it back and got a dedicated lower instead - best decision I could have made.

Interesting.

Have tried it on Polymer 80 lowers I am building in the process of

@Blowback9

10 ай бұрын

No. The problem with DIY lowers is that it's easy for them to be out-of-spec which can cause a lot of problems. I'd recommend using a new stripped upper from any large manufacturer. One of my adapters is in a cheap Anderson lower - works great.

I wish they made higher capacity colt mags in 45acp

@tomliemohn624

9 ай бұрын

You could contact Tim La France out of California. He is, or was, building AR styled carbines that used Thompson mags and fired .45ACP. Tim is really quite a legend, having supplied Hollywood with many of the prop weapons used in shows like Die Hard and dozens of others.

@0dirty

8 ай бұрын

I don't think he does that kind of work anymore. Nearly everything he made was for military or law enforcement, but if there was a mag adaptor available, I'd be super interested.@@tomliemohn624

Hello sir! Love your insight on the ar9 platform!!! I was wondering if I want to add a laser aiming module to an AERO EPC9 would you go with the enhanced upper and handgaurd or do you think the regular threaded will hold up fine?

Did you ever try the MEAN EndoMag®?

@Blowback9

10 ай бұрын

No, and I don't plan to. Having the ejector built into the magazine is a bad idea, IMHO. The standard process to clear any semi-auto firearm is to remove the mag and eject the chambered cartridge. Doing this with an EndoMag would leave the round in the chamber, which sets up the user for a negligent discharge.

@dwindlefoddl7225

2 ай бұрын

HORRIBLE design for the EndoMag..garbage..

Do you know if thats the same conversion thing they use in their KAK K15 in 9mm? I want something easily convertible between 9mm and .223. (I fucked up and bought a .223 upper without being able to buy the lower).

so just buy an ar9 lower is what I got from this

@Blowback9

3 ай бұрын

A dedicated lower is usually the best option, yes! I like using standard AR lowers, and being able to easily switch the lower to a different caliber is important to some folks.

I’m looking at pro mags block it’s very similair to the ones in your video. Have you had any experience with their block?

@Blowback9

8 ай бұрын

Promag blocks are plastic and I've seen several reports of them breaking. I would avoid them and use the metal blocks instead.

Have you tried out the spikes tactical spider 9mm colt lower or variants similar to that and if so, what are your thoughts?

@Blowback9

9 ай бұрын

I have not, sorry!

I need colt mags for my AR9 i also have this adapter but im not sure what will fit but im looking to get atleast a 30 round

@Blowback9

4 ай бұрын

Take a look at ASC, C-Products, AR Stoner, and Duramag mags. I use ASC and AR Stoner in my Colt mag rigs and they run perfectly for me.

@ARP_king5.56

4 ай бұрын

@@Blowback9 thank you 🙏🏽 im wating for some metal promags

@dbmail545

Ай бұрын

I use ASC Colt SMG pattern magazines exclusively. Rugged, reliable but a bear to load without the correct LULA.

@ARP_king5.56

Ай бұрын

@@dbmail545 i see i see i havent fully tested mine out tbh but will soon it was having some hiccups

I just installed this mag block in my PSA lower and running the Matador 9 upper, installing was very easy but as soon as I ran through function checks I noticed failure to feed aswell as failure to extract/eject any help?

@Blowback9

8 ай бұрын

I don't have a matador yet to test. Ejection failures are usually due to the ejector alignment. Feed failures are usually due to the feed ramp or feed cone, but could be mag related if using cheap polymer Colt mags. That's where I would start. Check the "4 Steps to make (almost) any 9mm AR run 100%" video for tips.

@jcash0904

8 ай бұрын

Hey. I recently finished modifications to my matador arms montgo-9 so it would use colt mags, have last round bolt hold open using psa lower. You need to check the extractor and shim it for proper extraction. You may also need to shave some metal from the mag catch hole to lower how high the mag sits. I shortened my eject side feed ramp some also to give more room for the casing to exit. Your feed ramp could potentially be contacting the bolt carrier not allowing it to fully go into battery

Stern's unit takes glock mags.

@Blowback9

10 ай бұрын

Yes, I tried one and sent it back. It moved the magazine release to an unfamiliar location for an AR, and the ejector was hardened so it couldn't be bent into proper position relative to the bolt without breaking.

MEAN ARMS

@Blowback9

4 ай бұрын

The endomag + this upper would make for a very easy conversion for a normal AR. Just need to be careful when clearing - the Mean Arms Endomag ejector is on the mag and makes clearing a little different.

Dont go it, ladies and gentlemen!!! Its 2024...there are way bettee options! I recommend getting a dedicated lower. Im a GLOCK guy, but i built mine almost a decade ago...and colt lowers were a fraction of the glock lowers back then (were very knew and not a lot of companies were making them...unlike today)

@Blowback9

3 ай бұрын

Dedicated lowers are always a better option than using an adapter!

@dwindlefoddl7225

2 ай бұрын

Not anymore..check prices lately?

@user-ft4hx6kk5w

2 ай бұрын

@@dwindlefoddl7225 on colt style lowers? No. But there are a ton of companies making glock compatible lowers, now...10 yrs ago, it was slim pickens and they were much pricier. Glock lowers were like $400+...now i see them for well under $200