ropeup79
Member
No adapter. 5/8x24 threaded about twice as long as normal with a collar loctited in place for a shoulder. Maximum thread diameter is .625” and the barrel diameter before threading was .635 or slightly more. Works great without any tolerance stacking.For a collar with no adapter, I need an O.D. of .65" or greater. A standard Tikka barrel is .62" at 24". You probably have smaller threads on the barrel itself, judging by the length, probably 9/16-24, and 5/8-24 threads on the end of your adapter.