CMMG Banshee MK4 5.7x28mm 5in Pistol, 32rd

Description

The CMMG Banshee MK4 5.7x28mm 5in Pistol, 32rd is a compact AR-platform pistol built for close-quarters work. Chambered in the flat-shooting 5.7x28mm cartridge, it uses a 5-inch barrel and CMMG’s radial delayed blowback system to keep recoil light and cycling smooth. This pistol accepts standard AR15 lower parts and CMMG’s 32-round conversion magazines, giving you a familiar platform in a fast, maneuverable package.

Key Features

• Radial Delayed Blowback System — Why it matters: This design slows the bolt’s rearward movement just enough to reduce felt recoil and muzzle rise, letting you stay on target for faster follow-up shots.
• 5-Inch Barrel in 5.7x28mm — Why it matters: The 5.7x28mm round delivers high velocity and low recoil from a short barrel, making this pistol ideal for tight spaces where every inch of maneuverability counts.
• 32-Round Magazine Capacity — Why it matters: With a full 32 rounds on tap, you spend less time reloading and more time shooting, whether at the range or in a defensive scenario.
• Ambidextrous Controls — Why it matters: A reversible charging handle and ambidextrous safety selector let left- and right-handed shooters run the gun without fumbling for controls.
• Optics-Ready Receiver — Why it matters: The upper receiver is machined with a flat top and mounting holes for common reflex sights, so you can add your preferred red dot without a gunsmith.

Who It’s For

This pistol is built for the shooter who values speed and compactness in a familiar AR platform. If you train for home defense, run drills on a short-range course, or simply appreciate the flat-shooting nature of 5.7x28mm, the Banshee MK4 fits your hand and your style. It’s also a solid choice for anyone who already owns AR15-pattern rifles and wants a pistol that shares parts and manual of arms.

Pros & Cons

• Pro: Radial delayed blowback cuts recoil noticeably compared to direct blowback 5.7 pistols.
• Pro: Uses standard AR15 lower components — triggers, grips, stocks (if you later SBR it) are all off-the-shelf.
• Pro: 32-round magazine gives you serious firepower in a small package.
• Con: The 5-inch barrel limits velocity somewhat compared to longer 5.7 rifles, though the cartridge still performs well at typical pistol distances.

Comparison: CMMG Banshee MK4 vs. Zev Technologies OZ9 vs. LWRC SMG 45

The Banshee MK4 splits the difference between a traditional handgun and a PDW. It offers higher capacity and lower recoil than the OZ9, and it weighs less than the LWRC SMG 45 while still delivering a flat-shooting round.

FAQ

• ✅ Nationwide delivery (all 50 states)
• ✅ Ships 1-2 business days
• ✅ 30-day returns
• ✅ Secure checkout

Browse more AR Pistols and 5.7x28mm firearms in our store.

Last updated: April 2026