Daniel Defense DDM4 300 S, .300blk, 10.3 Barrel, Upper Receiver Group

The Daniel Defense DDM4 300S Upper Receiver Group is a premium AR15-style complete upper designed for superior performance in the versatile .300 Blackout caliber. Featuring a compact 10.3-inch cold hammer forged barrel with Daniel Defense's proprietary S2W profile, this upper delivers enhanced muzzle energy from .30 caliber projectiles while maintaining compatibility with standard 5.56 bolts and magazines. Ideal for suppressed shooting, home defense, hunting, and tactical use, it offers exceptional accuracy and reliability in a fast-handling, short-barrel configuration.Crafted with meticulous attention to detail, the DDM4 300S incorporates mil-spec components including a 7075-T6 aluminum upper receiver with M4 feed ramps, a chrome-lined barrel with 1:8 twist, and a pinned low-profile gas block for optimal direct impingement operation. The included GRIP-N-RIP ambidextrous charging handle ensures smooth manipulation for both left- and right-handed shooters, while the M16 profile bolt carrier group is chrome-lined and properly staked for durability. The 9-inch DDM4 quad rail handguard, CNC machined from 6061-T6 aluminum, provides ample Picatinny mounting space and comes with heat-resistant Santoprene rail panels.Proudly made in the USA, this upper receiver group features high-quality finishes like Type III hard coat anodizing and salt bath nitride on the flash suppressor, ensuring corrosion resistance and long-term performance. Weighing just 3.65 lbs, it balances lightweight handling with robust construction using chrome moly vanadium steel that's HP/MPI tested. Whether building a compact PDW or upgrading an existing AR platform, the DDM4 300S stands out for its precision engineering and adaptability across various ammunition types.Elevate your AR build today-purchase the Daniel Defense DDM4 300S Upper Receiver Group at Battlehawk Armory.Specifications:Mounting System: PicatinnyCaliber: .300 BlackoutMaterial: Chrome Moly VanadiumManufacturing Process: Cold Hammer ForgedTwist Rate: 1:8"Gas System: Pistol LengthBarrel Length: 10.3"Barrel Profile: S2W (Daniel Defense's Proprietary Heavy Barrel)Product Weight: 3.65 lbs