Drop in replacement quad rail handguards for carbine length AR15s, for use with carbines using a Front Sight Base and Delta Ring. These handguards are made of an impact resistant fiber-reinforced nylon, with aluminum heat shields. A black, two piece railed hand guard for AR-15 carbines constructed of a high impact glass filled nylon polymer with integral aluminum heat shield inserts. Features Mil-Spec Picatinny rails at the 12, 3, 6, and 9 o