The 7.0 Free Float Picatinny Handguard was designed to work with carbine length AR15 gas systems and its exceptionally light weight makes it perfect for short rifles where size and weight are crucial performance attributes. Precision CNC machined 6061 T6 aluminum and finished in hard coat type 3 mil-spec anodized black for a rock hard lasting finish while weighing in at a mere 8.5 ozs.