Gemtech Hvt Quickmount 7.62mm - QM-HVT-BR. 62mm Carbon Cutting Muzzle Brake Threaded 5/8-24 Specifications for Gemtech Hvt Quickmount 7.62mm: Caliber: 7.62mm Option: Carbon Cutting Muzzle Brake threaded 5/8-24 Carbon Cutting Flash Hider threaded...