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Posted: 5/25/2014 4:26:07 PM EDT
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I know this has been discussed, but I did a couple of searches and went back 8 pages and didn't see anything.
I recently assembled a couple of identical PSA lowers for family members and both ordered identical PTAC uppers (the $189s) for them. The problem is that while the pivot pin isn't extremely hard to push in and out, the takedown pin is VERY tight, to the point where I'd have to use a hammer to get it in (which I'd rather avoid). I also can't really tell what is causing it, and the problem is pretty much identical on both guns. What do you suggest? This is the first issue I've had with a PSA product. When I really squeeze the uppers together it feels a little easier to wiggle them in partway, but I can't tell what exactly is rubbing. Kinda feels like I need to file something down, but I don't want to start doing that without knowing the most likely spot to start. Thanks for any help 
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Quoted:
I know this has been discussed, but I did a couple of searches and went back 8 pages and didn't see anything. I recently assembled a couple of identical PSA lowers for family members and both ordered identical PTAC uppers (the $189s) for them. The problem is that while the pivot pin isn't extremely hard to push in and out, the takedown pin is VERY tight, to the point where I'd have to use a hammer to get it in (which I'd rather avoid). I also can't really tell what is causing it, and the problem is pretty much identical on both guns. What do you suggest? This is the first issue I've had with a PSA product. When I really squeeze the uppers together it feels a little easier to wiggle them in partway, but I can't tell what exactly is rubbing. Kinda feels like I need to file something down, but I don't want to start doing that without knowing the most likely spot to start. Thanks for any help A tolerance-stacking issue. Sometimes they're loose, sometimes they're tight. Go back to the maker for relief. |
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This is a common issue and unless the drillings are seriously misaligned the usual strategy is to oil it up and just use it. It wears in faster than you think.
I have a CMMG upper/ RRA combo that I had to use a plastic mallet for the first 5 or 6 times, now I can use a finger and pull it out with firm pressure. I have one of these in my main box top shelf: Tool for pushing out pins If you are way off, GSMullins has the fix. |
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Quoted:
This is a common issue and unless the drillings are seriously misaligned the usual strategy is to oil it up and just use it. It wears in faster than you think. I have a CMMG upper/ RRA combo that I had to use a plastic mallet for the first 5 or 6 times, now I can use a finger and pull it out with firm pressure. I have one of these in my main box top shelf: Tool for pushing out pins If you are way off, GSMullins has the fix. I also had this on an RRA upper and a PSA lower. It wore in with a little oil and time. Just keep working it. |
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