Shipping & Compliance
- This item is a firearm under federal law and must ship to a Federal Firearms Licensee (FFL). It transfers like any other firearm, with an ATF Form 4473 and a background check through the FFL, where state and local law allow. Some states ban or restrict this item. Buyers are responsible for compliance with all applicable federal, state, and local laws governing the purchase, transfer, possession, and transport of this item.
- Magazine capacity is restricted in certain states. We do not ship this item to states where its capacity exceeds the legal limit -- affected orders are blocked automatically at checkout.
The MCX SBR (IR / FDE) is SIG's folding‑stock MCX short‑barreled rifle: piston‑driven, fully ambi, M‑LOK, suppressor‑ready muzzle device. These SKUs are the 11.5‑inch 5.56 FDE IR and 9‑inch 300 BLK FDE IR, 30‑round mag. NFA SBR. MCX, not an AR‑15 lower.
MCX SBR 300BLK FDE 9" 30+1 RMCX‑300B‑9B‑IR‑SBR
- Model: MCX SBR
- Caliber/Gauge: 300 AAC Blackout
- Action: Semi‑Auto
- Barrel Length: 9"
- Capacity: 30 + 1
- Finish: FDE IR Cerakote
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