Are all MK II actions the same?

[model14]

With the exception of the trigger assembly, are all Mark II rimfire actions the same, including how the barrel is mounted to the receiver?

[sharpshooter]

NO...There is the old style pre-accutrigger, the first generation accutrigger, and currently the "E" receiver version. They all have pinned barrels, the latest version being slightly different. The "E" receivers no longer use a recoil lug.