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Posted: 3/5/2009 3:32:52 PM EDT
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I'm in the process of installing an A2 buffer tube into a lower receiver. It seems like where the tube threads into the lower, it is VERY TIGHT. I have used some gun oil for lube, but it feels like "if this goes on, it's stayin' on". Is this normal? |
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if it's that tight something is wrong. Have you tried another buffer tube on that lower? something is out of spec, either the threaded part of the lower or the threaded part of the buiffer tube. Figure out which one is out of spec by trying another buffer tube in that lower (I hope you have not damaged the threads in the lower), or that buffer tube in another lower, then look around and find a tap or die of the correct size (whichever you need) and correct the problem before you go any further and possibly ruin a good $100-$150 lower for a $15 buffer tube.
NEVER force anything on a gun,slow and easy is the way to go. That buffer tube should screw in easily by hand. First figure out what is wrong, then fix the problem before going on....<><....:) |
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Quoted: if it's that tight something is wrong. Have you tried another buffer tube on that lower? something is out of spec, either the threaded part of the lower or the threaded part of the buiffer tube. Figure out which one is out of spec by trying another buffer tube in that lower (I hope you have not damaged the threads in the lower), or that buffer tube in another lower, then look around and find a tap or die of the correct size (whichever you need) and correct the problem before you go any further and possibly ruin a good $100-$150 lower for a $15 buffer tube. NEVER force anything on a gun,slow and easy is the way to go. That buffer tube should screw in easily by hand. First figure out what is wrong, then fix the problem before going on....<><....:) I tried another tube and it screwed in very smoothly. It must be the A2 tube that has whack threads on it. I guess I'll return the stock assembly, but this seems like the worst time to try and get an exchange when everyone is busy with orders. |
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I'm curious if (assuming the threads on the buffer tube are just slightly too large) I can just sand them down lightly since it seems like the issue is that the threads are JUST SLIGHTLY larger than the inner diameter of the lower portion where it screws in. The actual threads appear to be OK and I am able to trace them with my fingernail. |
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Quoted:
I'm curious if (assuming the threads on the buffer tube are just slightly too large) I can just sand them down lightly since it seems like the issue is that the threads are JUST SLIGHTLY larger than the inner diameter of the lower portion where it screws in. The actual threads appear to be OK and I am able to trace them with my fingernail. I asked the same question last night. Tried a different A2 tube and it went right in. Tried the first tube, that would barely start in the first lower in a second lower and it went in about 3/4 of the way before it became tight. I was also thinking about filing the threads slightly. But didn't get to it today. |
| what you could do is stop by your local gunsmith and ask him to run the buffertube into the correct size die to clean it up. If he works on or builds AR's he most likely would have the correct die (and tap if you ever have a problem with the threads in a lower. You may even try a regular machine shop, they may have the right sized die....<><....:) |
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