Daniel Defense 10.3″ 300S AR-15 Complete Upper – Black


Caliber- .300 Blackout

Barrel Length- 10.3″

Barrel Material- 41V50 Chrome Moly Vanadium Steel

Twist Rate- 1:8

Barrel Profile- S2W

Color- Black

Rail- DDM4 Rail 9.0

Weight- 3.65lbs

3 in stock

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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.

Additional information


Daniel Defense


.300 AAC Blackout