Includes: Top & Bottom rail sections, 4 Allen screws, Allen wrench Materials: 6061 Aircraft Grade Aluminum Compatibility: AR-15 Rifles with delta ring and front end cap installed Weight: 12 oz Length: 13.5 in Height: 2.5 in Internal Diameter: 1.7 in Color: Black & Flat Dark Earth Warranty: 1 Year Keymod Handguards for the Carbine Platforms. Handguard extends past the front sight post, giving you more handguard surface area for your hands and shooting accessories. Easy Drop-In install, no special gunsmithing involved, fit into Delta Ring and front Handguard Cap. Remove factory handguard, drop in the Keymod handguards and use supplied screws to secure Keymod handguard in place.