Add the versatility of a picatinny rail system to your rifle with NO GUNSMITHING! The Yankee Hill Triple Mount attaches to the barrel of your AR-15 to allow the mounting of picatinny accessories. The three mounting surfaces allows you to attach accessories like flashlights, laser sights and grips at 3, 6, and 9 o'clock. The Triple Mount will mount to barrels with diameters of .730 and .750 (required bushings included) with supplied cap screws. Designed to fit rifles with and without a bayonet lug. The Triple Mount from Yankee Hill is made from aircraft quality aluminum and hardcoated to mil. specs for years of use.