This is a Daniel Defense AR known as the DDM4v7 chambered in 223 Remington, model 02-128-13192-047.
The Daniel Defense V7 is the first rifle in the DDM4 lineup to feature the M-LOK(R) attachment technology with the Daniel Defense MFR 15.0 rail. Built around a Cold Hammer Forged" 16" barrel" the V7 has a DD improved Flash Suppressor to reduce flash signature. The mid-length gas system provides smooth and reliable cycling under any condition and reduces both perceived recoil and wear on moving parts.
Features:
Mil-Spec
Enhanced Flared Magazine Well
Cold Hammer Forged Barrel
Daniel Defense Flash Suppressor
M16 Profile BCG