I need to buy a HK feeler gauge from Hk parts/:
Last edited by Decay; 08-24-2017 at 05:37 PM.
Some calipers will also get in there.
When it comes to clones built on used parts (PTR, Century), bolt gap will only tell you about bolt gap, not about whether the parts are fitting together correctly.
You are not checking the head space. You are checking bolt gap.