LWRC ICDIU5CK10ML ICDI M-LOK Direct Impingement 5.56mm NATO 10.5" 1:7" 1/2x28 Bbl FDE Complete Upper ReceiverThe LWRC ICDI is a complete upper receiver chambered in 5.56mm NATO, featuring a 10.5" barrel with a 1:7" twist rate. It comes with a 1/2x28 thread pitch for easy attachment of muzzle devices and is finished in Flat Dark Earth for a tactical look. The LWRC ICDIU5CK10ML upper incorporates an M-LOK rail system for versatile mounting options, allowing for easy attachment of accessories. Utilizing a direct impingement system, this upper is designed for reliability and performance, making it a great choice for compact, lightweight firearm builds. LWRC ICDI M-LOK Direct Impingement 5.56mm NATO 10.5" 1:7" 1/2x28 Bbl FDE Complete Upper Receiver ICDIU5CK10ML