This video debunks common AR-15 building myths, focusing on the necessity of specialized tools and techniques. It clarifies that standard upper receiver blocks are sufficient for most builds when using reasonable torque specs for the barrel nut. The presenters also explain that gas block alignment is more forgiving than often believed due to the gas port's size and that clamping the barrel during muzzle device installation is acceptable. Finally, they address the misconception that using a torque wrench to loosen fasteners damages it, explaining its internal mechanics.
This video, the second part of the SmythBusters series, features Bill Geissele of Geissele Automatics addressing the myth of galvanic corrosion in AR-15 firearms. Geissele, drawing on extensive experience with machinery and firearms, explains that the direct contact of bare steel and un-anodized aluminum, which is required for galvanic corrosion, is rarely present in an AR-15 assembly. He shares that after nearly a decade of using Geissele's Super Modular Rail handguard and aluminum barrel nuts, he has found no evidence of such corrosion. The discussion also touches upon the appropriate use of lubricants and anti-seize compounds in threaded joints.
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