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Posted: 10/12/2013 2:01:27 PM EDT
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I was just reading a thread in GD where someone is having a bitch of a time removing a barrel from a BCM
carbine and some are speculating about the lube or lack-of used in the assembly. I assembled my first AR in the early '90s and used Teflon pipe dope to lube the barrel threads. I know now that lithium grease is usually recommended, but I've used PTFE pipe thread compound sparingly on every other barrel I've installed. I've had no reason to remove the barrel from any of my tefloned rifles yet, but that may change in the future. I've also had no problem with reliability or accuracy through thousands of rounds through these rifles. My question is, is lube lube when it comes to barrel installation or have I doomed myself to future frustration by using the farmer-method? |
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Read this file if you want to know what Uncle Sam chose as requirements: MIL-G-21164D
For a quicker answer, NO. You have steel contacting aluminum, which will rust if the proper lubricant isn't used. I'm not sure what temperature the exterior of a semiauto rifle chamber reaches, but Teflon melts at about 620*F. |
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For the barrel nut and receiver threads, Aeroshell 33MS or a quality molybdenum grease is recommended. No graphite.
Fun thread here with homemade galvanic corrosion tests and various types of grease... http://www.ar15.com/forums/t_3_4/612575_Grease_Nazis_this_thread_is_for_you__Galvanic_corrosion_test_with_pics_.html |
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