The CMMG Banshee Mk3 (CMMG part no. 38AE50BAB) carries the AR15’s reputation for modularity up into .308 Winchester, built on CMMG’s Mk3 platform sized for the AR-10/LR-308 pattern. A 12.5-inch barrel and 20+1 capacity give this pistol real full-caliber performance in a shorter, more maneuverable package than a traditional .308 rifle. The EML handguard runs full-length M-LOK slots on both sides and the bottom, plus additional M-LOK sections between the top Picatinny rail segments, for flexible accessory placement. CMMG equips this Banshee with a full slate of Zeroed parts and includes a 20-round PMAG, all finished in armor black.

Key Specifications

• Chambered in .308 Winchester/7.62 NATO, a full-power cartridge suited for longer-range performance.
• Holds 20+1 rounds per magazine, and ships with a 20-round PMAG included.
• Runs a 12.5-inch barrel for solid velocity retention from a full-power cartridge in a compact package.
• Built on CMMG’s Mk3 platform, sized to the AR-10/LR-308 high-pattern design for larger-caliber cartridges.
• Wears a full-length EML M-LOK handguard with mounting slots on both sides, the bottom, and between the top rail sections.
• Equipped with CMMG’s Zeroed 60/90-degree safety for a shorter, faster selector throw.
• Includes a full slate of CMMG Zeroed parts, from the pistol grip to the drop-in trigger.
• Ships at approximately 9.7 pounds including packaging, a manageable class for a full-power .308 pistol.
• Cycles in reliable semi-auto for controlled, repeatable follow-up shots.
• Finished in armor black for a tough, low-maintenance exterior.

Frequently Asked Questions

What platform is this Banshee built on? The Mk3 platform, sized to the AR-10/LR-308 high-pattern design to handle full-power .308 Winchester.

Does it come with a magazine? Yes, a 20-round PMAG ships with the pistol.

What caliber does it fire? .308 Winchester/7.62 NATO, a full-power cartridge suited for longer-range performance.

Buy the CMMG Banshee Mk3 Pistol, .308 Win, 12.5-Inch, Armor Black

Few AR pistols deliver full-power .308 performance in a package this compact and modular. CMMG’s Zeroed parts kit and full-length M-LOK handguard make this Banshee ready to build out exactly the way you want. Order it from our AR pistols lineup at our Lubbock, Texas gun shop for fast, insured shipping to your FFL.