kimberacp Posted March 9, 2012 Share Posted March 9, 2012 what are the differences between the two? is one better than the other? thanks Link to comment Share on other sites More sharing options...
highxj Posted March 9, 2012 Share Posted March 9, 2012 I used to have a 121 M1 in the 80's. The 'main' difference is that, while still inertia operated, it had a dropping locking block rather than a rotating bolt. And, I believe it cycled much faster than the current system. That was one of it's big claims to fame at the time. Link to comment Share on other sites More sharing options...
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