The Tiger Rock Inc. GB01-B .750 Low Profile Steel Gas Block enhances your AR-15 performance with minimal bulk. It's designed to fit seamlessly beneath quad rail systems and accommodates standard .750 diameter barrels. Engineered from hardened steel, this gas block ensures outstanding durability in challenging environments. Its non-reflective matte black finish not only looks sleek but also provides functional stealth. Mil-Spec dimensions .750 diameter compatibility Hardened Steel construction for durability Non-reflective, Matte Black finish Includes Roll Pin, 2 set Screws, and Allen Wrench Optimize your AR-15 with this reliable and functional gas block today.