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Posted: 1/14/2018 10:42:13 AM EDT
[#1]
Go through the return hassle or do some light sanding.
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Posted: 1/14/2018 10:42:30 AM EDT
[#2]
If the stock tube is screwed in where it comes past the top inside edge of the lower the upper will hit it and not close fully causing the pin to seem tight.
I have seen a front pin that was bent slightly. It would work fine without the upper on but the bend gave problems and would not allow it to go all the way through when the upper was installed. I have seen uppers where the area right behind the front or rear lugs was not milled flush with the rest of the uppers contact surface. It would hit on the areas where the high part overlapped the lowers top surface and made it difficult to close down. I have seen uppers where the rear curve was to far back and would hit the curve in the lower before it closed all the way. It was on a few non feed ramp uppers I bought and they would close barely on some lowers but not close on others. |
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Posted: 1/14/2018 10:58:43 AM EDT
[#3]
If it's new factory, I'd try to go through the hassle of returning it before possibly taking off metal.
See how it fits with bolt carrier out. |
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Posted: 1/14/2018 11:15:21 AM EDT
[#4]
Go shoot the thing. It will loosen up
I much prefer them to be tight to start. All the stags I have assembled needed a hammer to move the pins. Shoot it. Oil the pins. Work them in and out while watching TV. All will be good |
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Posted: 1/17/2018 10:15:44 AM EDT
[#5]
I like a tight fit. You likely have no wobble between the receivers because of the tight fit.
Many people add wedges or screws to achieve what you already have. It will get easier to move the pin after you work it in and out enough. |
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Posted: 1/17/2018 12:42:38 PM EDT
[#6]
Quoted:
Brand new Bushmaster. Rear pin required drift and significant hammer taps to remove. Pin moves freely and smoothly in lower. Even worse was reinstalling. I had to resort to serious pressure (padded vise jaws) to get upper and lower close enough to each other to get pin in. Then it required further tapping to get it in fully. Once assembled, action appears to work correctly. Impossible to continue to endure this take-down hassle. Thoughts? CY6 Greg Sullivan "Sully" SLR15 Rifles TheDefensiveEdge.com (763) 712-0123 |
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Posted: 1/17/2018 8:35:08 PM EDT
[#7]
C'mon, man, just fix it, but first break it in which will loosen it some. Then you would examine the pin hole in the upper receiver rear locking lug to see where the pin is rubbing it - verify corresponding rub marks on the pin. Take a few light swipes with a properly-sized round file centered on the rub area, filing halfway around the hole. Assemble and pin - should be a lot better, maybe good enough because it will wear some more.
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Posted: 1/18/2018 7:36:08 PM EDT
[#8]
Quote HistoryQuoted:
I like a tight fit. You likely have no wobble between the receivers because of the tight fit. Many people add wedges or screws to achieve what you already have. It will get easier to move the pin after you work it in and out enough. |
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Posted: 1/18/2018 8:01:10 PM EDT
[#9]
Where'd 1-post OP go??? Joined in 2011, and posted once since then? Never acknowledged or thanked the helpful Arfcommers in the thread. Bad form dude. Bad form.
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Posted: 2/2/2018 5:34:15 PM EDT
[#10]
OP is back. Sorry for the poor form.
Sent to factory. Buffer tube installed incorrectly from factory. Just received back and all is good. Thanks for the guidance. |
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Posted: 2/11/2018 8:58:01 PM EDT
[#11]
Quote HistoryQuoted:
If the stock tube is screwed in where it comes past the top inside edge of the lower the upper will hit it and not close fully causing the pin to seem tight. I have seen a front pin that was bent slightly. It would work fine without the upper on but the bend gave problems and would not allow it to go all the way through when the upper was installed. I have seen uppers where the area right behind the front or rear lugs was not milled flush with the rest of the uppers contact surface. It would hit on the areas where the high part overlapped the lowers top surface and made it difficult to close down. I have seen uppers where the rear curve was to far back and would hit the curve in the lower before it closed all the way. It was on a few non feed ramp uppers I bought and they would close barely on some lowers but not close on others. |
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