Maximize mobility with this ultra-compact 7.5 5.56 NATO Complete Upper Receiver. Featuring a 7.5 barrel with a 1:7 twist rate this upper ensures reliable bullet stabilization for 5.56 NATO ammunition making it ideal for close-quarters tactical home defense or AR15 pistol builds. The 7 M-Lok handguard offers a lightweight modular platform for mounting accessories while the nitride-finished bolt carrier group delivers smooth cycling enhanced durability and low maintenance. Complete with a charging handle and built to Mil-Spec standards this upper is ready to pair with any AR15 Mil-Spec lower receiver for a seamless high-performance setup. – Caliber: 5.56mm NATO – Barrel Profile: Medium – Muzzle Thread: 5/8X24 – Twist Rate: 1/7 – Gas System: Pistol – Material: 4150 – Handguard Length: 7 in. – Charging Handle: Standard