The CMMG Banshee MKG is a semi-automatic pistol chambered in .45 ACP with a 5-inch chrome moly barrel, blowback operating system, and 7075-T6 aluminum receiver. At 4.80 lbs and 20.80 inches overall, this is an AR-pattern pistol rather than a conventional handgun — the overall length reflects the pistol buffer tube configuration. 
 

Key Specifications 

• Manufacturer: CMMG 
• Model: Banshee MKG 
• Type: Semi Automatic Handguns - Tactical 
• Caliber: .45 ACP 
• Barrel Length: 5 inches 
• Capacity: 26+1 rounds 
• Weight: 4.80 lbs 
• Condition: New in Box 
• Finish Color: Black 
• Operating System: Blowback 
• OAL (Overall Length): 20.80 inches 
• Sights: Optic Ready 
• Grips: Black Magpul 
• Receiver Material: 7075-T6 Aluminum 
• Safety Feature: Ambidextrous Safety Lever 
   

Detailed Features 

 
The Banshee MKG takes Glock magazines, which means 26-round .45 ACP magazines are readily available. The M-Lok handguard accepts accessories without adding meaningful weight. The optic-ready rail is ready for a red dot without additional machining. The ambidextrous safety lever works from either side. 
 
The blowback operating system is straightforward and reliable for the .45 ACP cartridge. The 5-inch barrel in this caliber gives full powder burn and adequate velocity for the cartridge. 
 

Usage Scenarios 

 
The Banshee MKG works well for home defense where the larger package is not a concealability concern and the 26+1 capacity in .45 ACP is a real advantage. For range use, the Glock magazine compatibility makes ammunition and magazine sourcing easy. The optic-ready design is useful for those who want to mount a red dot.

Owners of the CMMG Banshee MKG in .45 ACP generally praise the build quality. The 7075-T6 aluminum construction and fit are frequently cited as solid, and the Glock magazine compatibility is mentioned as a practical benefit for feeding and spare magazine availability.

The .45 ACP caliber and 26+1 capacity draw specific positive comments from owners who chose this over lower-capacity defensive platforms. The blowback cycling is noted as reliable.

Criticism mostly centers on weight — at 4.80 lbs it is noticeably heavier than a standard pistol, and some users note this affects handling over extended sessions. Recoil is manageable for most but a few mention the blowback .45 has more felt recoil than a locked-breech pistol of the same caliber. Price is another friction point for buyers comparing it to more conventional defensive handguns.

Accessory sourcing is occasionally mentioned as a minor limitation since the platform is less common than standard AR-15 configurations.