THE ULTIMATE GUIDE TO AR-15 MUZZLE BRAKES

I'm not talking about "just lubing it below and there". They need that shit on the lookout cleaner than when it had been new out of the FN factory.besides which i will get "genuine" things - yhm for rails, even though they are a tiny bit out of spec, even now do the job well for me (the rails are somewhat shorter when compared to the spec)I underst