CMMG AR15 Low Profile Gas Black Assembly .750" Inner Diameter Overview - .750 Low profile gas block, includes installation screws; All CMMG products come with our Lifetime Quality Guarantee; Specifications Diameter : .750in inner diameter; Material : 4140 Chromoly steel; - At Sportsman's Warehouse, we live for the thrill of the great outdoors. Whether you're hunting, fishing, camping, backpacking, or shooting, having the right gear is key to making every moment unforgettable. That's why we bring you only the highest quality, trusted brands-because your outdoor experiences deserve the best. From expert advice to quality gear and community events, Sportsman's Warehouse is more than a store-we're your partner on every journey. Come explore with us and experience the difference passion makes.