1st Prototype: 1993
Features: a) Semiautomatic capability with 6-shot internal magazine.
b) Partly automated recovery mechanism
2nd Prototype: 2016
Features: a) Semiautomatic capability with 8-shot external magazine.
b) Partly automated recovery mechanism (reworked).
3rd Prototype: In planning
Features: a) 8-shot external magazine (mounted beneath rather than on top)
b) Fully automated recovery mechanism.
Designer: NathanielsCAD