Daniel Defense - DDM4®300 S Upper Receiver Group - 10.3", 300 BLK

The DDM4 300S AR15 style Upper Receiver Group is designed for those demanding a high-performance, short-barrel rifle chambered in the versatile 300 Blackout cartridge. Built around a 10.3-inch barrel, the 300S Upper Receiver Group uses standard 5.56 bolts and magazines to deliver .30 caliber projectiles with greater muzzle energy than comparable 5.56mm platforms. With a wide variety of factory ammunition made for everything from home defense, target shooting, hunting, suppressed operation, and tactical applications, this upper receiver group is capable of delivering exceptional performance from a compact, fast-handling package. The independently ambi GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group.

NFA DISCLAIMER: This firearm is a regulated item by the National Firearms Act (NFA). Please check with your local and state municipalities for any further regulatory requirements. It is the buyer's responsibility to make sure they comply with all NFA rules and applicable laws.

Materials & Construction:

• Upper Receiver: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
• Barrel: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:8 Twist, 10.3" S2W Profile, Pistol Length Gas System, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
• Gas System: Pinned Low Profile Gas Block CNC Machined of 4140 Hardened Steel and Mil-Spec Heavy Phosphate Coating, Pistol Length, Direct Impingement
• Muzzle Device: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
• Bolt Carrier Group: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
• Sights: Sold Separately
• Handguard: Daniel Defense DDM4 Rail 9.0, CNC Machined from 6061-T6 Aluminum, Type III Hard-Coat Anodized
• Charging Handle: GRIP-N-RIP Charging Handle, Body CNC Machined of 7076-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized
• Rail Panels: Daniel Defense Rail Panels Made from Santoprene, Heat Resistant to 300°F
• Made in the USA!

Specifications:

• Mounting System: Picatinny
• Caliber: 300 BLK
• Material: Chrome Moly Vanadium
• Manufacturing Process: Cold Hammer Forged
• Twist Rate: 1:8
• Gas System: Pistol Length
• Barrel Length: 10.3"
• Barrel Profile: S2W® (Daniel Defense's proprietary Heavy Barrel)
• Product Weight: 3.65 lbs
• Manufacturer: Daniel Defense