FAB Defense Standard Picatinny Rail for AR-15/M4/M16

FAB's UPR Universal Picatinny Under Rail provides enhanced position versatility for your tactical lights and lasers and any other Picatinny compatible accessory by attaching to the handguard. Compensates the handguard's angle to allow desired parallel to barrel positioning. It is constructed of a durable reinforced polymer and is compatible with your AR15/M16/M4.