Andro Corp AR-15 Complete Upper Features The Andro Corp Industries AR-15 Complete Upper is built around a 10.3 inch chrome moly vanadium barrel a material chosen for its ability to resist wear and maintain accuracy across extended use. A 1:7 twist rate stabilizes a wide range of 5.56 NATO bullet weights giving the builder flexibility in ammunition selection from lightweight varmint rounds to heavier match loads. The barrel is threaded to a standard 1/2x28 pattern allowing the installation of a compensator flash hider or suppressor mount without needing specialized machining. As a complete upper it arrives ready to pin onto a compatible AR-15 lower simplifying the build process for users assembling or upgrading a rifle. Surrounding the barrel is an M-LOK handguard giving the shooter direct mounting points for lights foregrips bipods and other accessories without the need for separate rail sections or adapters. This modular mounting system keeps the upper s profile slim while still offering versatile accessory placement options. The 10.3 inch barrel length makes this upper well suited for a compact pistol build or a short barreled rifle configuration depending on the builder s intended use and compliance requirements. For AR-15 builders seeking a complete accessory ready upper chambered in 5.56 NATO the Andro Corp Industries AR-15 Complete Upper is available for sale at GrabAGun. Andro Corp AR-15 Complete Upper Specifications Manufacturer: Andro Corp Caliber: 5.56 NATO Barrel Material: Chrome Moly Vanadium Barrel Length: 10.30 Twist: 1:7 Handguards: M-LOK Thread Pattern: 1/2x28 Available At: GrabAGun