Number of successful designs using DI (Direct Impingement) = 3

French MAS40, Swedish Ljungman, AR10/AR15


Number of successful designs using DB (Delayed Blowback) = 8 (if you count the G3 as five designs: CETME + G3 + HK93 + MP5 + CETME L)?

French FAMAS
German STG45
CETME / German G3 (and variants)
Swiss SIG 510

Number of designs using Piston = All the rest

JYD #123 The great one formerly known as Architect.

I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.