Manufactured to the highest quality standards; It is precision manufactured on Swiss lathes; It machined from AISI4140 steel that is then hardened to 55Rc (Rockwell C approx) and QPQ (Quench Polish Quench) Nitrided to AMS2753D standards; Its unique Short Energy Pulse system reduces length of recoil; Full auto fire is possible with massively reduced recoil and muzzle climb; The mount design is not Licensed from Q and therefore suppressor warrantly will be effected; Comes with appropriate timing shim set; Serial numbered for quality control; Made in the USA