CMMG BANSHEE Mk4 .300 AAC Blackout AR Pistol, 8 in Barrel, Customized with Law Tactical Folder, SB Tactical Brace, and Dead Air Xeno Mount
This CMMG BANSHEE Mk4 in .300 AAC Blackout is a compact, U.S.-made AR-15 pattern pistol set up with thoughtful upgrades for a refined, user-focused build. It features an 8-inch threaded barrel with a two-prong flash hider on a Dead Air Xeno-style suppressor mount, a Law Tactical folding receiver extension adapter with an SB Tactical arm brace, and a free-float M-LOK handguard wearing tan G-10 panels. A slick-side upper with a receiver-length top rail, ambidextrous extended charging handle, and enhanced-pattern controls round out a clean, purpose-built configuration.
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 Details: This firearm is in great shape with minor, superficial scratches and blemishes visible from light handling and use.
What’s Included
- 1x 30-round Magpul PMAG GEN M3 300 BLK polymer magazine
- SB Tactical arm brace (installed)
- Law Tactical folding receiver extension adapter (installed)
- Two-prong flash hider with Dead Air Xeno-style suppressor-mount collar (installed)
- Ambidextrous/extended charging handle (installed)
- Magpul MOE K2 pistol grip (installed)
- Tan G-10 M-LOK handguard panels (installed)
The BANSHEE Mk4 platform here is the micro-size series with an 8-inch, threaded .300 BLK barrel and a direct impingement action. The slick-side upper omits the forward assist and carries a Picatinny rail on the receiver; the handguard’s 12 o'clock is a continuous smooth/M-LOK surface with no Picatinny segment. The free-float aluminum handguard provides M-LOK slots and arrives fitted with tan G-10 panels for added traction and heat management.
Controls are set up for efficient use. An ambidextrous, extended dual-latch charging handle with CMMG logo is installed, as is an enhanced-pattern bolt catch and a standard right-side magazine release. The lower is marked "CMMG Mk4 Boonville, MO USA" and uses AR-15 pattern magazines. Receiver construction pairs a billet 6061-T6 aluminum upper with a forged 7075-T6 aluminum lower.
Notable custom features include a Dead Air Xeno-style suppressor mount with two-prong flash hider, a Law Tactical folding receiver extension adapter, and an SB Tactical arm brace. The grip is a Magpul MOE K2, and the handguard wears tan G-10 M-LOK panels. Capacity is 30+1 and one Magpul PMAG GEN M3 300 BLK magazine is included.
The owner stated that this pistol is equipped with a LaRue Tactical MBT two-stage trigger and a Geissele magazine release; these components were not visually verified. A marking reading "POF-USA CRE-AT CE 07/23" was observed on a component inside the receiver extension area.