MuayThaiJJ Posted November 23, 2020 Share Posted November 23, 2020 Wondering if this is a better place to post this question: I have a comp that has been pin and welded. while assembling today I noticed a tiny bit of wiggle that it didn't have before. Is this an issue? If so, is the solution to get a tig weld and reheat the pin to seal it on the threading again? I've read on an AR15 forum to "Just fire a few shots and the fouling tightens any looseness." thanks! Link to comment Share on other sites More sharing options...
ltdmstr Posted November 23, 2020 Share Posted November 23, 2020 I wouldn't count on fouling fixing the problem. Not sure how you did the pin, but there shouldn't be any play to start with. The weld just makes it permanent. Link to comment Share on other sites More sharing options...
MuayThaiJJ Posted November 23, 2020 Author Share Posted November 23, 2020 Yeah, it's bugging me. I'm gonna get it hit again with the welder and hopefully that will seal it Link to comment Share on other sites More sharing options...
TonytheTiger Posted November 23, 2020 Share Posted November 23, 2020 The pin getting more weld on top of it is besides the point. If the brake is threaded on most of the way and it still wobbles you've got some garbage threads on it or the barrel. If the brake is snugged up to the barrel shoulder and it still wobbles you've got some next level bubba gunsmith shenanigans going on. Link to comment Share on other sites More sharing options...
MuayThaiJJ Posted November 23, 2020 Author Share Posted November 23, 2020 Ugh, yeah I'm afraid it the pinmight need to be removed and all redone...great Link to comment Share on other sites More sharing options...
ClangClang Posted November 23, 2020 Share Posted November 23, 2020 (edited) It does not sound like you torqued the comp appropriately before drilling and pinning. If it's currently wobbling, it was loose before you drilled it. FYI you'll likely need to drill a new hole, because it will be rotated further once you properly tighten it. You can possibly avoid drilling a second hole if you play around with stacking shims so that when you've torqued between 20-35 ft lbs the holes line up. Also, if you don't have shims, get some. I really don't like crush washers. They're cheap, but that's their only redeeming quality. Edited November 23, 2020 by ClangClang Link to comment Share on other sites More sharing options...
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