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Posted: 2/16/2009 7:27:22 PM EDT
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Upon disassembly of an AR I bought several years ago, I found an issue with the receiver and buffer tube threads.(Buffer tube is a commercial version) Threads are damaged and material transferred from the tube to the receiver.(Pictures below)
Has anyone else had this problem? Will this get worse with additional use or can I ignore this as long as the tube is tight after I install the castle nut? Is there a repair method for this? Receiver Threads http://img3.imageshack.us/img3/2333/receiver1pw4.jpg Buffer Tube http://img3.imageshack.us/img3/4827/receiver2bf0.jpg |
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Quoted:
Quoted:
Do you know what caused this? It's galling. I like to put a little grease on the receiver extension threads before installing. +1 This is why the -23 calls for greasing the threads when installing the receiver extension. Unfortunately a lot of folks skip this step when assembling lowers. |
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Quoted:
That makes me worry about my rifle. Do most manufacturers use the moly grease on assembly or would it be a good idea to pull the buffer tube off and check? Is it even worth worrying about? Some receiver extensions are staked in place, while others may be loctited. So, If it ain't broke, don't try to fix it, since pulling the tube may end up with more a mess than when you first started; and find out that all the work/destruction you just did, was in vain if the tube was installed correctly the first time around. |
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Looked this subject up in "The AR-15 Complete Assembly Guide" and they recommend installing the buffer tube using Loc-tite. They even go on to
say they do not recommend using anti-seize grease and torqing the buffer tube. Anyone have any ideas they would reccomend against it? The book was authored by two very knowledgeble people one of which is the founder of Fulton Armory so it seems they would know their stuff. |
You might consider this: Available from Brownell's, link here. |
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