Description We set out to make one of the most affordable complete uppers, without sacrificing the integrity of the complete upper, and most important the rifle. This upper features a 16″ NBS M4barrel chambered in 6.8 SPC with a 1:10 twist and a carbine gas system. With the NBS line we wanted to make sure that we used quality products that wouldn’t break the bank. This means using a nitrided steel gas block from APOC Armory as opposed to aluminum and using reputable internals like one of our classic NBS 16″ carbine Barrels. Made in the USA Lifetime Warranty Upper Receiver NBS– 7075 Aluminum– Pairs beautifully with any mil-spec lower– M4 Feedramps Barrel NBS 16″ 6.8 SPC II M4 Contour 1:10 Carbine 41V50 Barrel – Parkerized Gas System Carbine Length– APOC Armory Nitrided Steel Gas Block– Stainless Steel Carbine Length Gas Tube Handguard 12″ Free Float Quad Rail – Black Muzzle Device KAK Industry 1/2-36 Slimline Micro Flash Can About the Brand NBS by Gat Ammunition, LLC NBS — Our In-House Brand for Builders Who Demand Reliable Performance and Real Value. Designed for builders who demand reliable performance and real value without unnecessary hype or inflated pricing. NBS stands for “No Bullshit.” Built on Strong Industry Partnerships Through the strong partnerships Gat Ammunition, LLC has built with trusted suppliers and vendors, we regularly gain access to premium components often manufactured by or for leading industry names. By purchasing these in volume, we bring them to you under the NBS label, ensuring proven quality reaches your build at a fair price, without the added cost of extensive marketing. Quality You Can Trust Every NBS product is specified to the exacting standards we apply to our own rifles. Each component features precision CNC machining, American-made key components where it counts, robust materials, dependable steels, and durable finishes engineered for long-term reliability. These items are either sourced from reputable OEMs or carefully assembled in-house using established name-brand elements, maintaining consistent excellence throughout the lineup. Complete Solutions for Serious Builders From stripped and complete uppers to bolt carrier groups, handguards, lower parts kits, and beyond, NBS provides a unified, affordable selection that allows you to complete confident, high-performing builds. Backed by a Limited Lifetime Warranty All NBS products come with our Limited Lifetime Warranty for the original owner, covering defects in materials and workmanship. Gat Ammunition, LLC stands firmly behind these parts because, as shooters ourselves, we use and trust them, delivering honest value and gear you can rely on. NBS Limited Lifetime Warranty — For the Original Owner Covering defects in materials and workmanshipGat Ammunition, LLC stands firmly behind these partsAs shooters ourselves, we use and trust themDelivering honest value and gear you can rely on Additional information Weight 68.2 oz Dimensions 28 × 5 × 5 in Barrel Finish Mag Phosphate Barrel Profile M4 Cartridge Compatibility 6.8 SPC Barrel Length 16" Gas System Length Carbine Twist Rate 1-10 BCG / Charging Handle Not Included UPC 999994463
