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Old May 13, 2012, 05:27 AM   #19
madcratebuilder
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Join Date: November 2, 2007
Location: Northern Orygun
Posts: 4,923
Quote:
Originally Posted by evoasis
Is there any different processes with metal treatment etc? I heard certain brands have a better metal quality than others.. Alloy types etc.. Bushmaster has always been a reliable brand, and I don't see a difference between the two; I'd say go big and build what you want from scratch.
95% of AR brands use forged 7075 upper/lower, minor differences in the type of finish on these two parts. RE's can be commercial diameter or mil-spec diameter. Most RE's are extruded 6000 series, a true mil-spec is forged 7075.
Different barrel steel grades. Mil-spec bolts have a specified series of testing and material specs. For most users the steel grade and testing makes little difference, but there is a difference.
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