Daniel Defense DDM4 300 S Upper Receiver Group 10.3" .300 BLK (1:8 CHF S2W Barrel)
The Daniel Defense DDM4 300 S is a .300 AAC Blackout upper receiver group built around a 10.3" cold hammer forged, chrome-lined Chrome Moly Vanadium barrel with a pistol-length direct-impingement gas system and pinned low-profile gas block. The upper receiver is 7075-T6 aluminum with M4 feed ramps, paired with a Daniel Defense DDM4 Rail 9.0 Picatinny handguard for accessory mounting.
This upper is equipped with a Daniel Defense flash suppressor. A BCM MK2 charging handle is included with this unit. No bolt carrier group is included.




