Originally Posted by
MDriskill
While all the early Vulcan relatives had the same basic receiver, trigger, piston etc., it might be more accurate to say the original C1 was actually a Victor action with a shorter barrel and a Vulcan spring. Its flat-faced rear cylinder cap, lack of a safety, skinny 14mm barrel, and short front sight casting were all Victor parts.
The C1 “inherited” later Vulcan refinements, though, including the safety, a heavier 16mm barrel (better balance IMHO), and the curved trigger (did much to help the awful grip position).