Strike Industries Strike Rail 15-1/2in Forend - Strike Industries Strike Rail is a lightweight, feature packed rail that you can depend on when entering harm's way. The rail features 1.57" internal diameter for suppressor compatibility, ambidextrous QD socket placement, a built-in anti-rotation, and reinforced steel mounting nut and bolt. The package includes a Strike Rail Handguard, mounting hardware, Allen key, barrel nut and wrench and shim kit.