Faxon Firearms Duty Complete Upper Features The Faxon Firearms Duty Complete Upper is built around a 16 inch barrel machined in a Gunner profile a design that trims material under the handguard for reduced weight while keeping extra mass near the gas block and muzzle for stability. Chambered in 5.56 the barrel is sized to run the full range of common 5.56 and .223 Remington ammunition reliably. As a complete AR-15 upper it carries the standard flat-top Picatinny rail so it is optics ready right out of the box for a red dot or magnified optic of the shooter s choice. This upper is threaded at the muzzle giving the shooter the option to run a compensator flash hider or suppressor mount of their choosing. A 15 inch M-LOK handguard ships with the upper giving the shooter plenty of room to mount lights lasers bipods and other accessories directly to the free-float rail. The M-LOK slots are positioned around the handguard for accessory placement at multiple clock positions without needing separate rail sections. Faxon Firearms built the Duty line for shooters who want a dependable drop-in upgrade over a mil-spec upper without stepping up to a full custom build. Whether completing a home build or upgrading an existing rifle the Faxon Firearms Duty Complete Upper delivers a durable duty-capable foundation for a 5.56 AR-15. Faxon Firearms Duty Complete Upper Specifications Manufacturer: Faxon Firearms Model: Duty Complete Upper Caliber: 5.56 Barrel Length: 16 Barrel Description: Gunner Profile Handguard: 15 M-LOK Available At: GrabAGun