I have two HK 91s (Saco A3 made in 1977 & an A2 made in 1981).
The A3 has a bolt gap of .012 (.305mm) and the A2 has a bolt gap of .015 (.381mm).
I have a couple of brand new HK locking mechanisms and HK +4 rollers and wondered if the consensus would be that it was time to install them?
The A3 has a bolt gap of .012 (.305mm) and the A2 has a bolt gap of .015 (.381mm).
I have a couple of brand new HK locking mechanisms and HK +4 rollers and wondered if the consensus would be that it was time to install them?
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