The Colt M4 / M16 Barrel Thread Converter (also known as a muzzle coupler or muzzle coupling) from Tacticool22 allows you to mount standard end-of-barrel accessories such as flash hiders, recoil compensators, or unrestricted fake Tactical Suppressors.This threaded adapter is a direct replacement for the factory flash suppressor. It even has the o-ring groove. The converter has 3/4a ^2 / 19mm wrench flats, so you can still easily field strip your rifle. You do not have to loosen the muzzle device to field strip your rifle, just the converter.For a consistent, clean look, the largest diameter matches current A2 Birdcage and similar flash suppressors. In addition, the WM1 Muzzle Brake and AM1 Muzzle Brake look great on this converter.3/4a ^2 / 19mm wrench flatsBlack oxide finish for years of trouble-free service.