ARP 5.56 12.5" 3R Scout profile melonited barre
- 223 Wylde chamber
- Mid length gas system
- 1:10 twist 3R rifling
- .750 gas block
- M4 feed ramps
- 5/8x24 muzzle thread
- 1lbs 12oz
ARP Superbolt
Aero Precision upper receiver, squared to barrel
M16 Carrier w/ staked gas key