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The .45 ACP has been doing serious work for well over a century, and the CMMG Banshee MkG is arguably the most modern and refined way to run it in a compact AR-platform package. Built on CMMG's MkG platform with Glock-pattern magazine compatibility, this pistol accepts Glock 21 and 30 magazines — so if you're already stocked up on .45 ACP Glock mags, you're ready to go. The 8-inch 4140 chrome moly steel barrel wears a salt bath nitride finish for solid corrosion resistance and durability, and the muzzle is threaded at 37/64-28 for suppressors or your muzzle device of choice.
What sets this pistol apart from the crowd of blowback-operated PCCs is CMMG's Radial Delayed Blowback operating system — the same system that was literally born on the .45 ACP MkG platform back in 2017. Instead of the violent, heavy-bolt cycling that defines traditional straight blowback .45 builds, the bolt rotates slightly to delay the opening cycle. That fraction-of-a-second delay lets CMMG use a lighter bolt carrier group and buffer while delivering a noticeably more manageable recoil impulse. Compared to straight blowback .45 ACP carbines, the difference at the bench is real and immediately apparent. It also makes this platform an outstanding suppressor host — the delayed action reduces port noise significantly, which reviewers and testers have consistently noted.
The receiver set is aluminum finished in Titanium Cerakote, giving it a sharp, distinctive look with real-world durability. The EML M-LOK handguard runs full-length M-LOK slots on the sides and bottom, plus M-LOK sections between the top Picatinny rail segments — plenty of real estate for lights, lasers, or grips. The RIPBRACE deploys quickly and keeps things compact when not extended. Controls are ambidextrous, including the safety lever, which is a genuinely useful feature on a pistol-format AR. CMMG's ZEROED drop-in trigger and ZEROED grip round out the package, and everything is made in the USA and backed by CMMG's Lifetime Quality Guarantee against defects in materials and workmanship.
The Banshee MkG is built around Glock-pattern .45 ACP magazines, specifically compatible with Glock 21 and Glock 30 mags. It ships with one 13-round magazine. CMMG recommends sticking with OEM Glock magazines for the most reliable function, as some aftermarket Glock-pattern options can be hit or miss with the MkG platform.
The barrel is threaded at 37/64-28, which is the standard thread pitch for .45 ACP muzzle devices. This makes it compatible with most .45 ACP suppressors and compensators on the market. The CMMG ZEROED Linear Compensator is one common pairing, and the gun also makes an excellent suppressor host thanks to the Radial Delayed Blowback system's reduced port noise.
The Radial Delayed Blowback (RDB) system adds a brief rotational delay to the bolt's opening cycle, which allows CMMG to use a lighter bolt carrier group and buffer compared to traditional straight blowback designs. The result is a noticeably softer, more manageable recoil impulse for a .45 ACP pistol — reviewers consistently note it outperforms straight blowback platforms even in smaller calibers. It also reduces port noise, which is a meaningful benefit when running a suppressor.
Yes, the Banshee MkG in .45 ACP has earned a strong reputation as a suppressor platform. The Radial Delayed Blowback system's brief lockup period reduces port pressure and at-ear noise compared to straight blowback designs, and .45 ACP subsonic loads are readily available. The threaded 8-inch barrel gives you good length to work with, and the fixed ejector (FE) version of the RDB system represents a further refinement of the platform.
FE stands for Fixed Ejector, referring to a refinement CMMG made to the Radial Delayed Blowback system in the MkG platform. The fixed ejector design is an update over earlier rotating ejector versions and represents CMMG's ongoing development of the MkG operating system. It contributes to more consistent and reliable case ejection during the firing cycle.
Yes. The Banshee MkG comes standard with an ambidextrous safety lever, and CMMG's ZEROED parts package includes an ambidextrous charging handle as well. The magazine well on the MkG lower is also flared to help with faster reloads using the Glock-pattern .45 ACP magazines.
| UPC | 840442505356 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 45A890FTNG |
| Barrel Length | 8" |
| Caliber/Gauge | .45 ACP |
| Capacity | 13 + 1 |
| Safety | Ambidextrous Safety Lever |
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