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Posted: 8/7/2013 10:13:36 AM EDT
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I just got my first build together, but am having an issue with the upper and lower not mating up completely.
Before i get started here are the components: - Yankee Hill Lower (forged) - Generic LPK from dude on GunBroker (could be the issue) - Stag Complete upper from Rainier Arms. I know that this is a common issue, but I am wondering since this is my first build (and I don't know any better) if the issue could be the size of the 'take-down pin'. There is hardly any movement at the 'pivot pin', but quite at bit at the take-down pin. I've seen the bushings they sell for $5 to fix this problem, but i am wondering if #1 if anyone else has changed pins and had that work or #2 if i just need to live with the jiggle. I have another billet lower that I am planning on building soon, and wonder if i should just try it and see if i have the same issue. Any help is greatly appreciated. Thanks http://i1212.photobucket.com/albums/cc441/samson_ite/photo22_zps5f881623.jpg |
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Normally the jiggle is not an issue. Most of my issue rifles have had quite a bit of play in them. A cheap way to cut down on the jiggle is to put a foam ear plug underneath the rear take down pin. Depending on your lower a whole ear plug might not fit, so you might have to cut the plug down to fit. |
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If it didn't have any wiggle you'd probably be posting a thread, "my upper and lower are too tight".
The only way to get an absolute perfect fit is to test fit multiple uppers and lowers in various combinations, or buy parts (lowers mostly) known to be made for a tight fit, and "bed" the parts together (rubber mallet, lapping compound etc) until you get the fit you want. |
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Quoted:
Thanks for the replies guys. feel much better about the first build. Now i just need to go shoot it. You'll be fine. My rifle that I've drug around all over creation and haven't babied has a decent amount of play. I had a RRA upper that I almost had to mallet shut the first time and I'll take some wiggle over that any day. |
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