Shadow Systems U526 Features The Shadow Systems U526 is built around an intermediate gas system paired with a hybrid-profile chrome-lined 4150 CMV barrel a combination engineered to deliver a refined smooth shooting impulse across a wide range of 5.56 NATO and .223 Rem ammunition. The chrome lining extends barrel life and resists corrosion from repeated firing while the hybrid profile balances weight against durability for a rifle meant for sustained duty use. A true two-stage duty trigger gives the shooter a predictable consistent break improving accuracy potential compared to a single-stage mil-spec trigger. The Maelstrom flash hider at the muzzle manages flash signature while the rifle s 1 in 7 inch twist rate stabilizes a broad range of bullet weights. Designed as a complete system rather than a parts-bin assembly the U526 pairs Shadow Systems proprietary furniture including a duty-focused polymer stock and grip with a rigid low-flex M-LOK handguard that stays stable under accessory loads. A Picatinny rail runs the length of the flat-top receiver giving the rifle a reliable optics mounting surface for a red dot or low-power variable scope. The rifle ships with two 30-round magazines and a manual safety selector rounding out a package ready to run from the first shot to the last. This Shadow Systems U526 is for duty-minded shooters for sale at GrabAGun who want a cohesive purpose-built 16 inch rifle rather than an assembled collection of parts. Shadow Systems U526 Specifications Manufacturer: Shadow Systems Model: U526 Action: Semi-Auto Caliber: 5.56 NATO / .223 Rem Barrel Length: 16 Barrel Description: Hybrid Profile 4150 CMV Chrome Lined Twist Rate: 1:7 Capacity: 30+1 Magazines Included: 2 Stock Material: Polymer Grip Material: Polymer Trigger: Two-Stage Duty Muzzle Device: Maelstrom Flash Hider Thread Pattern: 1/2x28 Optic Ready: Picatinny Rail Safety: Manual Selector Overall Length: 32.5 Weight: 6.45 lbs Finish: Black Available At: GrabAGun