Quoted: But, your's is a post ban and unless it is threaded 1/2 x 28 tpi, the stupid Cav Comp won't fit. If you thread 1/2 x 28 tpi, then you have to tack weld the pin.
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As far as I can tell, all muzzle breaks made for the AR15 series rifle are tapped to that pitch, so as to permit the usage of of them on preban uppers as well.
If you threaded it for a different pitch, why would you not need to weld it in place? The AW ban specifically prohibits threaded barrels, not barrels that will accept flashiders. Permanantly welding the brake over the threads is required for '94 ban compliance, not matter how you thread it.
I can personally reccomend the Cav Comp, having used several, and installed two of them...I wouldn't trust one of those set screw brakes at all since I watched one fly downrange after vibrating loose.
J.