The HX-QD 556 Ti suppressor - with patented and proven Flow-Through and Torque Lock technology and is built with a combination of Grade 5/Grade 9 Titanium and 17-4 stainless steel. It delivers superior accuracy and repeatability, is full-auto rated, and compatible with 5.56 rifles with no minimum barrel restrictions. It utilizes OSSs new Flash Cap that eliminates virtually all flash. And unlike other 556 titanium suppressors, the HX-QD 556 Ti has a stainless-steel core that delivers durability in excess of 40"000 rounds vs. all titanium suppressors that last a fraction of that.Features :.223 Remington/556 NATOFull-Auto ratedIncludes 1/2x28 556 Flash HiderGrade 5 Titanium body