DoubleStar Picatinny Gas Block AR-15, LR-308 0.936" Matte Black

Machined from 6061 T6 aluminum and incorporating the 1913 picatinny rail, the DoubleStar gas blocks have a pleasing angular profile and insure a perfect gas seal. The blocks are hard coat anodized. Four angled tensioning set screws provide a solid lockup and prevent movement during function.