Gemtech

Gemtech 7.62 Flash Hider (5/8-24) Caliber - 7.62 Sound Reduction Diameter Length - Weight Mount Material Full Auto Rated Finish Thread size: 1/2-28 (Fits some 6.8SPC carbines) Fits TPR-S, HVT-QM, QUICKSAND, and ONE suppressors. As a safety feature, 5.56mm suppressors will NOT fit onto 7.62mm adapters.