BCM Model BCM4 Mk12 Mod 0 Pattern AR-15, 5.56 NATO, 18 in Barrel, PRI Gen III Carbon-Fiber Forearm, FDE
This custom BCM Model BCM4 is a Mk12 Mod 0 pattern build in 5.56 NATO with an 18-inch barrel and a PRI Gen III carbon-fiber free-float forearm. It features a continuous receiver-bridging top rail, flip-up iron sights, VLTOR EMOD stock, and a two-tone finish with FDE/tan receivers, handguard, and stock paired with black/gray accessories.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minor handling marks from prior use. Please review the photos for a complete view of surfaces and finish.
What’s Included
- 1x 30-round Amend2 polymer AR-15 magazine
- Rail‑mounted folding bipod, forward‑stowing (installed)
- Polymer vertical foregrip (installed)
- A.R.M.S. flip-up rear sight (installed)
- Clamp-on flip-up front sight (installed)
- QD sling swivel under fore-end (installed)
- Right-side steel sling loop mount (installed)
- Magpul B.A.D. bolt-assist lever (installed)
Built on a forged aluminum BCM Model BCM4 lower marked "BCM Rifle Company – Model BCM4 – Cal MULTI," this rifle follows the Mk12 Mod 0 pattern with a PRI Gen III carbon-fiber rifle-length free-float forearm. A continuous, receiver-bridging top rail with numbered slots (approx. 2–42) provides a unified mounting surface; an accessory rail section is molded "PRECISIONREFLEX.COM."
The 18-inch BCM barrel is marked "BCM 1/8 5.56 NM" and uses a 1:8 twist for 5.56 NATO. It is threaded and fitted with a muzzle brake/compensator secured by a BCM-marked lock ring. Operation is direct impingement.
Sighting is handled by a clamp-on flip-up front sight on the barrel and an A.R.M.S. flip-up rear sight. The rifle ships with a polymer vertical foregrip and a separate rail‑mounted folding bipod (forward‑stowing) for added stability when needed.
Furniture and controls are thoughtfully upgraded, including a VLTOR EMOD adjustable stock in FDE with an integrated QD socket, a tan textured beavertail-style pistol grip, a BCM Gunfighter charging handle, and a Magpul BAD-style bolt-assist lever. QD sling hardware is installed, including a swivel under the fore-end and a right-side steel sling loop.
The rifle presents a two-tone scheme: FDE/tan receivers, handguard, and stock paired with black/gray accessories (e.g., sights, receiver‑bridging top rail, charging handle, BAD lever, buffer tube, and muzzle device/lock ring). The right side is marked "BRAVO COMPANY MFG., INC., HARTLAND, WISCONSIN, USA." Overall, this custom configuration brings together proven components in a clean, purpose-built Mk12 Mod 0 pattern package.