Not So Stabby (NSS), Standard
The Allstar Tactical CorkScrew flash suppressors are precision machined from 4140 high-carbon-steel, heat-treated to 55RC, and then finished using Ferritic Nitrocarburizing. Ferritic Nitrocarburizing, also know as QPQ Nitride coating, raises the final hardness to 60+RC and gives it a nice satin black finish. They are threaded to the standard AR15 / M4 / M16 5.56 threads of 1/2-28 UNEF for easy installation.
When installing this muzzle brake, we include a crush washer for ease of install, but it is optional due to the auto-tightening nature of the flash suppressor. There is also no need to align or clock this flash hider.