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Posted: 4/21/2009 6:06:31 PM EDT
I just finished building my new AR. Stag lower, RRA LPK, and an Alexander Arms 50 Beowulf upper. I'd post pics, but my camera has given up the ghost, and I have no way to transfer pics from my cell phone to my computer 
Is it normal for there to be a minute amount of slop in the A2 stock's fit over the buffer tube? It doesn't bother me as such, I just want to make sure I've done it right. I tightened the top rear buttstock screw, the one that screws into the buffer tube, as tight as it can go; I used a Craftsman power screwdriver. In fact, I'm pretty certain getting apart would be teh suck in a big way... |
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I had an A2 set up once (can't rmember the source of the parts) where the threads between the screw and the tube didn't quite match. The screw would go almost all the way in and seemed tight, but the stock was a little loose because the screw head wasn't actually seated all the way due to the thread problem. See if you have that problem going on as one possible solution. |
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Did you forget to install the A2 spacer? And you shouldn't need any power tools, stick to the hand tools. Nope. A2 spacer was installed. Didn't accidentally get it in backwards did you? The "nipple" of it goes towards the buttplate. Not sure why it's loose, all my A2 stocks have been very tight, in fact some of them require rotating them while they slide down the buffer tube. Which brand/mfgr is the stock and tube? |
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Did you forget to install the A2 spacer? And you shouldn't need any power tools, stick to the hand tools. Nope. A2 spacer was installed. Didn't accidentally get it in backwards did you? The "nipple" of it goes towards the buttplate. Not sure why it's loose, all my A2 stocks have been very tight, in fact some of them require rotating them while they slide down the buffer tube. Which brand/mfgr is the stock and tube? The nipple is in fact towards the buttplate. Not sure of the brand, I ordered it from PK Firearms. I might be able to find out. |
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I've noticed a problem. My upper buttstock screw, the one that threads into the buffer tube, appears to be crooked, like it's cross threaded. I tried several times to rethread it so that it was straight, but no good. When tightened, the upper part of the screw is actually biting into the buttstock, even shaved a bit of material out of the well the screw sits in. This appears to be a problem either with the threads on the screw or the threads in the buffer tube.
Is there some common screw I can get at Lowe's that has the right threads to mate with the buffer tube? |
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I had an A2 set up once (can't rmember the source of the parts) where the threads between the screw and the tube didn't quite match. The screw would go almost all the way in and seemed tight, but the stock was a little loose because the screw head wasn't actually seated all the way due to the thread problem. See if you have that problem going on as one possible solution. Re-reading the thread, this sounds like the problem I'm having I described one post up. What did you do to fix the problem? |
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I've noticed a problem. My upper buttstock screw, the one that threads into the buffer tube, appears to be crooked, like it's cross threaded. I tried several times to rethread it so that it was straight, but no good. When tightened, the upper part of the screw is actually biting into the buttstock, even shaved a bit of material out of the well the screw sits in. This appears to be a problem either with the threads on the screw or the threads in the buffer tube. Is there some common screw I can get at Lowe's that has the right threads to mate with the buffer tube? If you cross-threaded the screw and threads, likely the threads are messed up enough it continues to rethread in the screw in cross-threads. You may need get a tap and chase the threads to clean them up properly to get a new screw in there. Lowes usually has a pretty poor selection of fastener hardware, I've found ACE and TrueValue have a far better selection. All should have a board and tools to help you determine the actual thread on the screw and hole. Getting a new buffer tube may be an option to consider, if tap cleaning up the threads doesn't work, then you need to heli-coil the threads, the tap plus the heli-coil kit will probably cost more than a new buffer tube. Excuse me, Receiver Extension, NOT buffer tube. |
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I had to remove the dried Loctite from the buttstock screw on one of my rifles to get it to screw in all the way. It should be completely solid when correct. No rattle or slop. This worked for me. I dug most of the loctite out then re-installed. Still had to torque the hell out of the stock screw, but it went in straight and now, no slop at all. Solid as a rock. |
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commercial or milspec buffer tube? There is no mil-spec or commercial spec tube for an fixed A2 stock. That only applies to adjustable stocks. Not true...though I don't know who made it, I once came across an A2 stock that had and was set up for a commercial tube.The correct size tube just fit in it loose. |
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