BCM SPR Mk12 Upper Group Features
- 18" BCM SS410™ Barrel
- Rifle Length Gas System
- Taper Pinned Low Profile Gas Block or Fold Front Sight Base
- Rifle Length Handguards or Extended Rifle Length Handguards
- BCM BCG with fitted HPT/MPI Bolt
- Choice of Charging Handle
- Choice of Muzzle Device
