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Posted: 12/2/2016 11:36:22 PM EDT
| I recently ordered a new upper ( not naming the company until I here back from there customer service ) when I tried to install it on my lower the rear pivot pin will not go all the way in and it binds up . what is out of spec on the upper and is it something I can fix ? The lower has had multiple different uppers on it with no issues. |
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Light taps is ok - if you have to hammer the thing like driving in a nail no way
I would not personally break out the dremel. Do you have a different lower to try it on? Stag lowers have always been so tight that I had to tap the pins in to get them to close. They all turned out fine |
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I can say (because I'm not being held hostage for good CS) that my Spikes Tactical lowers are kind of like that.
Very tight fit once the pin gets 1/2 to 3/4 of the way in. I'm sure they do this purpose, so that people comment positively on the 'good fit' through a lack of play between the receivers. I personally don't like it, and think it's not their place to play with the base design. Reason, you start getting funny issues like oversized 1913pic rails from Seekins, lower/uppers that won't fit other uppers/lowers from Rock River Arms, or barrels that don't fit unstressed into uppers from Rainier. Worst part of the tight rear takedown pin is you need something to punch the pin out. Forcing with a bullet tip won't work. Needs something to help punch it. A bullet tapped with a full mag will work, but just not ideal all around. |
| Tap in with a small hammer and then shoot a couple of hundred rounds through, and it should loosen up, the few commercial built rifles I have bought, they have all been really tight when I first got them. Another thing I have had to do in the past, is take a small half round needle file and run it around the hole in the upper receiver to loosen it up slightly. |
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Oh, and don't listen to people here about taking tools to your stuff that isn't right.
It's always such a good idea to permanently alter stuff, usually voiding any warranty, etc; until it's your own stuff. Or the manufacturer MIGHT fix it. Many manufacturers have become very 'wrong for the sake of a fad' or 'no one else cares so it's OK' mindsets. Like having to heat uppers and freeze barrels just to install... |
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Quoted:
After listening to everyone , I lightly taped it in and then used a punch with just hand pressure to shove it back out. I did this about 10 times and it much better . Thank you for your help . Glad to hear it, most of us only advised you to tap it in because we have experienced exactly what you had going on! Tapping in and Beating in is pretty explanatory, you didn't horse and were able to work the pin and it started loosening up, now shooting it will also help things settle in together. Putting guns together is like a love affair, you have to let them get married and then make love with each other to become one. 
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