They are machined from 304 stainless steel billet and are threaded to accept ATAS™ inserts. These units require the use of an ATAS™ system insert, which you order separately to match the thread pitch on your host firearm.
They have sufficient bore diameter to safely pass a .458 projectile, yet are tough enough to stand up to full auto fire from an 11.5” M16. They will outperform a military issue M4 flash hider in flash reduction. Slots to fit our wrenches are milled into the body.