Colt Commando isn't - barrel is too short = low velocity = poor killing power from a 5.56 cartridge,
This derived from the change of policy of 'shoot to kill', to one of 'shoot to wound'. This was never said but a man screaming in a lot of pain next to you is a completely different thing to a dead one. Wounded need caring for and medic evacuation.
As to Challey 2 slight problem it will need a new gun soon as Bae don't make ammo for it an its different from the rest of the worlds 120mm. Why have bae stopped making it well the govt stopped ordering it.
A great shame as we were the only ones who used a projectile and a bag charge. No shell cases to dispose of and a good loader could get 6 shots a minute.
The CO of gunnery school at Lulworth at a BAEE in '82 if my memory serves me correctly, issued a challenge to one of the instructors to get 10 down in a minute. He did it in 1min 5 secs and still got his case of champagne!