Posted: 3/20/2014 12:58:25 PM EDT
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Just got my 10.5" upper in today, put it on my spikes lower, front pivot pin pushed in great, rear take down pin was a Fuc#*ng bear, i had to end up holding it down and tapping it into place with a small rubber mallet, the hole the rear lug on the upper seems a little oblong but not to bad, after its in i checked the function and it seems to work, havent shot it yet though. Just wondering because my 14.7" psa was wobbly and this one you pretty much need a battering ram to get the rear pin in. Im not in here to complain or bitch just wondering if there is something up with it? BTW in order to take the pin out i have to use a punch to get it out!
any tips or tricks ? |
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Good looking build! Thank you for your question.
Upper receivers, lower receivers, and pins all are built to certain tolerances. Sometimes those tolerances can stack creating a loose, snug, or tight fit. This is normal on the AR15 platform. That said, if you are unhappy with your upper please contact Customer Service for a resolution. |
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Welcome to the world of tolerance stacking!
I've had the same issue. IMHO, the ar15 platform was designed as a field serviceable rifle. With that said you should only have to use a bullet to to break down the rifle (even the bcg)... So.... If my upper was that hard to pot together I would use a different upper/lower. I had to play musical chairs to get all the fitment gtg. Some say just shoot it and it'll loosen but again, I don't like stretching metal receivers. |
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Quoted:
Welcome to the world of tolerance stacking! I've had the same issue. IMHO, the ar15 platform was designed as a field serviceable rifle. With that said you should only have to use a bullet to to break down the rifle (even the bcg)... So.... If my upper was that hard to pot together I would use a different upper/lower. I had to play musical chairs to get all the fitment gtg. Some say just shoot it and it'll loosen but again, I don't like stretching metal receivers. What? You won't be stretching the aluminum (not metal) receivers. It will just naturally 'loosen up' on it's own after being taken down several times. It's probably the take down pins itself that are tight anyway, not the receivers. |
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Quoted:
Good looking build! Thank you for your question. Upper receivers, lower receivers, and pins all are built to certain tolerances. Sometimes those tolerances can stack creating a loose, snug, or tight fit. This is normal on the AR15 platform. That said, if you are unhappy with your upper please contact Customer Service for a resolution. Im extremely happy with the upper, i just wanted to get some opinions, if it loosens up great, if it doesnt i may take a file to the hole in the lug just a little to make it a little easier. Never ran into it before so thought i would ask, Finish is extremely nice btw, for 299 i have not a single complaint, but i still need that 399 14.7" 
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thanks for knocking $100 bucks off those uppers PSA!! They obviously listen to their customers!!
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Quoted:
What? You won't be stretching the aluminum (not metal) receivers. It will just naturally 'loosen up' on it's own after being taken down several times. It's probably the take down pins itself that are tight anyway, not the receivers. Quoted:
Quoted:
Welcome to the world of tolerance stacking! I've had the same issue. IMHO, the ar15 platform was designed as a field serviceable rifle. With that said you should only have to use a bullet to to break down the rifle (even the bcg)... So.... If my upper was that hard to pot together I would use a different upper/lower. I had to play musical chairs to get all the fitment gtg. Some say just shoot it and it'll loosen but again, I don't like stretching metal receivers. What? You won't be stretching the aluminum (not metal) receivers. It will just naturally 'loosen up' on it's own after being taken down several times. It's probably the take down pins itself that are tight anyway, not the receivers. WHAT?? it'll just "loosen" up huh??? What do you think is happening when it "loosens up"??? You have two misaligned holes and you're trying to push a pin right through that two hole. You're creating tension somewhere, or you're removing material somewhere... Since we both don't know HOW MUCH he's whacking his pivot pin in, neither I nor you know if it's "GTG". They very well could be out of spec... or not. PS. Aluminum is a METAL... just in case you weren't sure. (For your reference: all aluminum is metal, but not all metals are aluminum.  )
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OP is the 14.7 a pistol? If so you should swap them out.
My ptac upper was wiggly on a psa lower . I later bought an Anderson lower for a different rifle and the PSA upper I put on it was so tight I could not even get the takedown pin out. Swapped them and the PTAC rode the Anderson perfect and the PSA fit the PSA lower like the were made for each other. |
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every AR i have taken took down has been pretty easy, flip it up and pop the pin in, this one is not quite like that, the lugs on the upper doesnt 100% match the holes in the lower, theyre off just a little, if i push down on the upper really hard and push the pin at the same time i can get it started and then i pretty much have to beat it in. You may be correct that somewhere there could be a bind that i just havent seen yet, im gonna switch over my 14.5" on the lower the 10.5" is currently sitting on and see how that fits tonight when i get off work, and throw the 10.5" on the other lower i have. If its a problem with the receiver im sure PSA will make it right and the same goes with spikes if its the lower.
Thanks for all the help guys, will update you on what i figure out! |
| My Dissipator was that tight. Lube the pin and pop it in 100 times and it'll be fine. As you shoot it, it will loosen. Tight is my preference. If you have to do any more than tapping it in you get it looked at. I have high and low shelf PSA lowers and some are tight and some are loose. |
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It's probably because the spikes tactical lower is a high shelf lower. The psa standard lower is low shelf. That is why the upper contacts the lower and the holes don't match. Problems of mixing parts manufacturers. Sometimes it doesn't come out perfect. High shelf of low shelf lowers will not affect takedown pin alignment... Just lube the take down pin and push it in and out until it starts to free up as the guy above said and I said yesterday. Not really a big deal. I definitely wouldn't be complaining about a super tight fit. It will function fine tight or not and it feels great when you have a super tight fitting rifle. |
Yeah i called psa this morning which gladly helped out, i had a buddy stop over with his bushmaster and it fit perfect no problems at all, so beat it in with a hammer tight on 2 spikes lowers and one bushmaster lower, and my buddys bushmaster it fit perfect on? Weird? I dont know wether to return it for a new one or file it down a little
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Quoted:
Yeah i called psa this morning which gladly helped out, i had a buddy stop over with his bushmaster and it fit perfect no problems at all, so beat it in with a hammer tight on 2 spikes lowers and one bushmaster lower, and my buddys bushmaster it fit perfect on? Weird? I dont know wether to return it for a new one or file it down a little Would you please try what myself and several others have said? Lube the take down pin, and push it in and out about 100 times. It will loosen up. |
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Lubed the pins, its easy to type what to do, but believe me, im gonna have to put alot of time into doing that 100 times, doing it 2 or 3 times is a mother. I have tommorow off so im gonna dick with it more then No doubt, it will take some times. BUT, I'm pretty positive it will work and will sure as heck beat sending it back. |
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Lubed the pins, its easy to type what to do, but believe me, im gonna have to put alot of time into doing that 100 times, doing it 2 or 3 times is a mother. I have tommorow off so im gonna dick with it more then Don't worry about it then. They will wear in time, until then you have a nice tight fit,so don't throw a fit. |
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According to the pic above it looks like it isn't a take down pin issue, but it appears that the rear of the upper is contacting the area of the lower near the buffer tube. That is not something that will loosen up with time, at least not in a healthy way.
Guys, look at the top right of the pic, not the take down pin holes. |
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Quoted:
According to the pic above it looks like it isn't a take down pin issue, but it appears that the rear of the upper is contacting the area of the lower near the buffer tube. That is not something that will loosen up with time, at least not in a healthy way. Guys, look at the top right of the pic, not the take down pin holes. This is exactly what i was trying to say, it touches there before the hole lines up to put the pin in! |
| I had the same problem,the rear lug was to far forward,pin was hitting front of receiver hole,and rear lug was not egg shape,it needs to be.(front to rear slightly)I checked for looseness on pivot pin before doing anything,i had a lot of slop on front lug,so I new when I loosen rear pin,i will have loose upper.I got my chainsaw sharpening stone ,smallest,oiled it up,went to rear lug,rear side of hole,and stoned back side of hole little at a time,staying away from top and bottom,you still want resistance when you are done,if not,you have good chance of loose upper.then I ordered dimpled pins from white oak,bullet works great.I would send it back,i had extra upper incase I screwed up.good luck. |
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rear lug of upper from bottom of receiver to bottom of lug should be .467,lower receiver shelf to top of receiver should be .500 or more.i am assuming it is hitting bottom shelf from looks of pic.cant see if it is flush at top.I had a rear lug that had to much meat for butcher,i grinded it down.(.505).
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Quoted:
It's probably because the spikes tactical lower is a high shelf lower. The psa standard lower is low shelf. That is why the upper contacts the lower and the holes don't match. Problems of mixing parts manufacturers. Sometimes it doesn't come out perfect. PSA's "standard lower" (LW lowers) are high shelf. The AP lowers and the SC lowers are low shelf but they aren't PSA's "standard lowers." That said, as mentioned, that wouldn't effect the fit. |
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This is exactly what i was trying to say, it touches there before the hole lines up to put the pin in! Quoted:
Quoted:
According to the pic above it looks like it isn't a take down pin issue, but it appears that the rear of the upper is contacting the area of the lower near the buffer tube. That is not something that will loosen up with time, at least not in a healthy way. Guys, look at the top right of the pic, not the take down pin holes. This is exactly what i was trying to say, it touches there before the hole lines up to put the pin in! yea i think you need to rreplace that one.. psa will take care of you. |
| i thought the same thing that it might be the spikes lower, tried both that i have and a bushmaster, all 3 have the same issue. a buddy of mine brought his bushmaster over and it fit on with no problems?? weird! and the other spikes lower i have has a PSA 14.7 upper on it that fits fine as it does on the pistol lower too |
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i thought the same thing that it might be the spikes lower, tried both that i have and a bushmaster, all 3 have the same issue. a buddy of mine brought his bushmaster over and it fit on with no problems?? weird! and the other spikes lower i have has a PSA 14.7 upper on it that fits fine as it does on the pistol lower too now that is weird. fits on some but not all. |