BCM BCM4 Registered SBR 5.56 NATO, 10.3 in Barrel, Daniel Defense Mk18 RIS II FDE, Geissele SSA, Law Tactical Folder, Radian Raptor-SD, Troy Folding Sights
This Bravo Company Mfg. BCM4 is a registered short-barreled rifle built around a 10.3-inch 5.56 NATO setup with a Daniel Defense Mk18 RIS II free-float quad rail in FDE. It is a custom-configured AR-15 platform featuring premium components throughout, including a Geissele SSA two-stage trigger, Law Tactical folding stock adapter, Radian Raptor-SD ambidextrous charging handle, B5 Systems Enhanced SOPMOD stock, Troy folding Battle Sights, a SureFire 3-prong flash hider, a Daniel Defense rail-mounted QD sling swivel socket, and a BCM Gunfighter KAG (1913/Picatinny) angled hand stop. The upper receiver is laser-marked "MK18" with the left-side oval "5.56" and the rail carries the typical DD/NSN engravings. This is an NFA item.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: The rifle shows scattered scratches and blemishes to the finish. The stock has remnants from previous spray paint. Both the front and rear sights show significant cosmetic blemishes. The handguard and rail exhibit blemishing within some Picatinny rail sections.
What’s Included
- Handguard: Daniel Defense Mk18 RIS II quad rail (installed)
- Sights: Troy Industries Folding Battle Sights, front and rear (installed)
- Charging Handle: Radian RAPTOR-SD ambidextrous charging handle (installed)
- Stock Adapter: Law Tactical folding stock adapter (installed)
- Stock: B5 Systems carbine stock with QD socket (installed)
- Hand Stop: BCM Gunfighter KAG (1913/Picatinny) angled hand stop (installed)
- Sling Mount: Daniel Defense rail-mounted QD sling swivel socket (installed)
- Muzzle Device: 3-prong flash hider (installed)
- One 30-round AR-15 magazine
Built on a Bravo Company BCM4 lower, this SBR pairs a laser-marked "MK18" upper with the Daniel Defense Mk18 RIS II FDE quad rail. The T-marked rails and typical DD/NSN engravings add correct visual details consistent with Mk18-pattern components. The aluminum receivers wear a hard-anodized finish.
Controls and core parts have been upgraded for performance and usability. The Geissele SSA two-stage trigger provides a clean, predictable break. The Radian Raptor-SD ambidextrous, ported charging handle improves handling and gas management, and the selector is marked SAFE/SEMI.
The back end is configured for compact storage and transport with a Law Tactical folding stock adapter and a B5 Systems Enhanced SOPMOD adjustable stock with a QD sling socket. Up front, a Daniel Defense rail-mounted QD sling swivel socket and a BCM Gunfighter KAG (1913/Picatinny) angled hand stop support secure, repeatable handling.
Sighting equipment includes Troy Industries folding Battle Sights (front FDE, rear black). The 10.3-inch, threaded 5.56×45mm NATO barrel wears a SureFire 3-prong flash hider. The platform is semi-automatic, direct impingement, and the stated capacity is 30+1.