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: 8.75 in Height: 2.5 in Internal Diameter: 1.7 in Color: Black & Flat Dark Earth Warranty: 1 Year Easy Drop-In install, no special gunsmithing involved, fit into Delta Ring and front Handguard Cap. Remove factory handguard, drop in the M-LOK handguards and use supplied four screws to secure M-LOK handguard in place. This model fits: Carbine Length Gas Systems. This replaces standard Carbine and M4 Length handguards. Solid fit, top rail is at receiver height and you have M-LOK slots along each sides and the bottom of the handguard. Includes two Accessory M-LOK to Picatinny Rail Sections. One Short (5 slot Picatinny) and one Medium (9 slot Picatinny) Length Picatinny Rail sections. They can be placed in any of the sides or bottom M-LOKA(R) slots. Black Anodized Aluminum Construction Handguard surface overall Length is 8.75". The Handguard extends past the front handguard cap and front sight post, to give you more surface area to place your hand and accessories.