IMI Defense Aluminium Quad Rail Carbine Drop In Black. This ultra-lightweight Battle 2 piece Quad Rail is a perfectly tight fit ultra-slim cross-section T-marked 1913 Picatinny rails at 369 & 12 Oclock for perfect mission adaptability for civilians and special forces personnel. Specifications for IMI Defense Aluminium Quad Rail Carbine Drop In: Manufacturer: IMI Defense Color: Black Fabric/Material: Aluminum Gun Make: AR Platform Gun Model: AR-15 Handguard Length: 6.65 in Gun Rail: Picatinny Weight: 250 g Features of IMI Defense Aluminium Quad Rail Carbine Drop In Mil-Spec 1913 Picatinny Rail at 369 & 12 Oclock. Machined from hardened aircraft aluminum. All sharp edges removed. Finished in Mil-Spec hard coat anodizing. No gunsmith needed for installation. 5 QD sling mount ports 2 on each side plus 1 on the front of the bottom rail. Consists of friction fit ledge with roll pins for secure locking. Ultra-slim design- Only 2.2? wide. Overall length: 6.65 in. Fits a round end cap Available for Carbine Rifles lengths. Package Contents: IMI Defense Aluminium Quad Rail Carbine Drop In IMI Defense IMI-ZARC3: Aluminium Quad Rail Carbine Drop In Black