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Well I just finish fitting the RRA National Match and I have to say it is very slick. I reckon it's breaking about 4 Lbs or maybe a tad more but the take up is pure silk and the break is like snapping a glass rod. Very pleased with it. Wondering what the reports of short life span are about? Is this trigger not case hardened?
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The RRA two stage is surface hardened. I have seen the RRA have wear problems with the dis-connecter. One reason I like the ArmaLite two stage, extra thick disco.
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Originally Posted by Sarge
Dfariswheel nailed it. I've slicked triggers on SA & DA revolvers, numerous auto pistols and about a dozen models of rifles over the last 35 years. The basic AR is one trigger I wont touch for the reasons he stated. Additionally, I'm not aware of an Armorer's School which does NOT recommend against it.
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The surface hardening on AR FCG's is no different than other fire arms. Armorer's School teach maintenance, you well need a collage level gunsmithing class to learn trigger modification.
Anytime you remove much surface material from a contact surface of trigger/hammer sear you need to address rehardening. Research a product called "kasenit".