Daniel Defense
10.3" .300 Blackout URG optimized for suppressed shooting with S2W barrel profile and 1:8 twist.
The DDM4 300 S Upper Receiver Group is Daniel Defense's purpose-built .300 AAC Blackout platform, optimized for both suppressed and unsuppressed shooting. The 10.3" barrel features Daniel Defense's proprietary S2W (Strength-to-Weight) heavy profile, providing enhanced accuracy and heat dissipation while maintaining reasonable weight.
The 1:8 twist rate is specifically chosen to stabilize both supersonic and subsonic .300 Blackout ammunition effectively. Subsonic 220gr loads perform exceptionally well suppressed, while supersonic 110-125gr loads deliver rifle-like terminal performance at CQB distances. The pistol-length gas system ensures reliable cycling across the full spectrum of .300 Blackout ammunition.
The DDM4 Rail 9.0" handguard provides Picatinny rails for mounting accessories, with included Santoprene rail panels for heat protection and improved grip. Like all Daniel Defense uppers, this package includes the M16 profile bolt carrier group (MPI tested) and GRIP-N-RIP ambidextrous charging handle.
Sig Sauer
Sig MCX Virtus Patrol 16"
2 shared compatibility tags
Sig Sauer
Sig MCX Spear-LT 11.5"
2 shared compatibility tags
CZ
CZ Bren 2 Ms 14" Carbine
2 shared compatibility tags
CZ
CZ Bren 2 Ms 16.5" Rifle
2 shared compatibility tags
Sig Sauer
Sig Sauer 716i TREAD 16"
2 shared compatibility tags
Daniel Defense
Daniel Defense DD5 V4
2 shared compatibility tags
Add the Daniel Defense DDM4 300 S Upper Receiver Group to your build and see how it enhances your platform.