The CMMG Banshee Mk4 is a compact AR-style pistol built on the modular Mk4 platform. Chambered for .223 Rem / 5.56 NATO with a 10.5-inch barrel, it offers carbine-like ballistics in a shorter overall package suitable for backpack or truck carry. This configuration includes a 30-round Magpul PMAG and CMMG RipBrace pistol brace. The Mk4 lower accepts standard AR-15 pattern uppers and CMMG conversion magazines for straightforward compatibility.
Key Specifications
- The caliber is .223 Rem / 5.56 NATO.
- The barrel measures 10.5 inches.
- The magazine capacity is 30 rounds.
- The operating system is direct impingement semi-auto.
- The handguard is CMMG EML9 M-LOK.
- The muzzle features 1/2×28 muzzle threads and a CMMG ZEROED linear compensator.
- The receivers are billet 6061-T6 upper and Mk4 forged 7075-T6 lower.
- The stock/brace is a CMMG RipBrace pistol brace.
- The trigger is a CMMG ZEROED drop-in single-stage.
- The listed weight is 5.5 lbs.
Built for modularity and practical use, the Banshee Mk4 provides full-length M-LOK attachment real estate and a top Picatinny rail to accommodate optics and mission-specific accessories. Its straightforward controls and accessory-ready layout make it easy to configure for personal carry, transport, or utility roles where a compact AR-pattern pistol is preferred.
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