LWRC ICDIU35CK16L ICDI Direct Impingement .350 Legend 16" 1:16" .562x24 Bbl FDE Complete Upper ReceiverThe LWRC ICDI Direct Impingement .350 Legend is a complete upper receiver designed for use with AR-15 style rifles. It features a 16-inch barrel with a 1:16 twist rate, which is optimal for stabilizing the .350 Legend cartridge. The barrel has a .562x24 thread pattern, making it compatible with a range of muzzle devices. The LWRC ICDIU35CK16L upper receiver comes in a Flat Dark Earth (FDE) finish and is part of the ICDIU35CK16L model. This setup is intended for shooters who prefer the direct impingement operating system in a versatile and durable configuration. Features of the LWRC ICDI .350 Upper: Lwrci Direct Impingement Operating System With Lwrci Keyless Bolt Carrier DesignLwrci Button Cut Nicorr-treated Barrel - 1:16 Twist RateLwrci Thread Protector 9/16 X 24 TpiLwrci Modular One-piece Free-float ForendLwrci Monoforge Upper ReceiverLwrci Ambidextrous Charging HandleC Products Dura-mag 5rd Stainless Steel MagazineH2 BufferCarbine Length Action Spring LWRC ICDI Direct Impingement .350 Legend 16" 1:16" 9/16x24" Bbl FDE Complete Upper Receiver ICDIU35CK16L