The CMMG Banshee MK4 is a 9mm pistol-caliber platform with a 5-inch barrel and a 30+1 capacity. It is finished in Midnight Bronze. The MK4 configuration ships with a 30-round magazine in a highly compact barrel format. 
 

Key Specifications 

• Brand: CMMG 
• Model: Banshee MK4 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 5 inches 
• Capacity: 30+1 rounds 
• Color/Finish: Midnight Bronze 
   

Detailed Features 

• 5-inch barrel in a highly compact pistol-caliber format 
• Midnight Bronze receiver finish 
• Ships with a 30-round magazine 
• MK4 platform chambered in 9mm

The 5-inch CMMG Banshee MK4 in 9mm attracts buyers who want the shortest practical pistol-caliber configuration. Owners generally praise the build quality, and the Midnight Bronze finish stands out among typically black or gray options in this category. The usual reservation is that the finish marks up with regular handling faster than hard-anodized alternatives.

At 5 inches, the barrel length is the defining characteristic, and opinions split along expected lines. Buyers who specifically wanted a compact setup report satisfaction, while others note limitations in certain shooting conditions that come with such a short profile. The 30+1 capacity is consistently appreciated.

On value, the Banshee MK4 sits at the higher end of the pistol-caliber market, and buyers either accept the build premium or compare it unfavorably to less expensive alternatives. Trigger feel draws mixed reactions, with some finding it adequate and others upgrading it as a first step.