CMMG 92A17DA-BB Banshee 300 Mk17 9mm 5" Pistol, Burnt Bronze

CMMG 92A17DA-BB Banshee 300 Mk17 9mm 5" Pistol, Burnt Bronze

The CMMG Banshee 300 Mk17 92A17DA-BB is built around a 9mm Radial Delayed Blowback action and a lower receiver designed for SIG P320/M17-pattern magazines. That combination separates the Mk17 from more conventional AR-pattern 9mm pistols that use Glock-pattern or Colt-pattern magazines and conventional straight-blowback operating systems.

This Series 300 configuration uses a 5-inch barrel, CMMG RML4 M-LOK handguard, RipBrace, ambidextrous controls, and Burnt Bronze Cerakote finish. With a listed unloaded weight of approximately 4.6 pounds, the Banshee packages the Mk17 operating system into CMMG's compact pistol format.

Radial Delayed Blowback Operating System

The Mk17 uses CMMG's Radial Delayed Blowback operating system rather than a conventional straight-blowback 9mm action. The system uses a rotating bolt and mechanical delay during unlocking, allowing CMMG to build the 9mm platform around an AR-style bolt and carrier arrangement without relying solely on a heavily weighted blowback bolt.

This operating system is one of the defining mechanical features of the Banshee platform and is more significant to the design than the external furniture or finish.

Mk17 Magazine Interface

The Mk17 lower receiver is designed around compatible SIG P320 and M17-style 9mm magazines. This pistol is supplied with a 21-round P320-pattern magazine and uses a magazine release configured specifically for the Mk17 receiver.

Magazine compatibility is therefore tied directly to the Mk17 designation. It should not be confused with CMMG's MkGs variants, which use a different magazine pattern.

5-Inch Threaded Barrel

The Banshee 300 uses a 5-inch 4140 chrome-moly barrel with a salt-bath nitride finish. The muzzle is threaded 1/2x28 and this configuration is supplied with a thread protector.

The short barrel is paired with CMMG's RML4 handguard, keeping the front end compact while retaining M-LOK mounting positions for compatible accessories.

RML4 M-LOK Handguard

The CMMG RML4 is a four-inch M-LOK handguard sized around the pistol's 5-inch barrel. Its short profile keeps the handguard close to the receiver while still providing attachment points for appropriately sized accessories.

The handguard, receivers, and brace components are finished in Burnt Bronze Cerakote as part of this factory configuration.

Forged Receiver Set and Ambidextrous Controls

The Mk17 uses forged 7075-T6 aluminum upper and lower receivers. CMMG equips the Series 300 configuration with an oversized ambidextrous charging handle and ambidextrous safety selector, providing control access from either side of the firearm.

A Magpul MOE pistol grip and integrated trigger guard complete the lower-receiver layout.

CMMG RipBrace

This model is equipped with CMMG's RipBrace and five-position enhanced receiver extension with ambidextrous sling plate. The brace is part of the factory Series 300 configuration and contributes to the compact overall layout of the Banshee platform.

Key Features

• 9mm Banshee 300 Mk17 pistol
• CMMG Radial Delayed Blowback operating system
• 5-inch barrel
• 1/2x28 threaded muzzle
• Thread protector
• 4140 chrome-moly barrel with salt-bath nitride treatment
• Mk17 receiver designed for compatible SIG P320/M17-style magazines
• 21-round P320-pattern magazine
• Forged 7075-T6 aluminum upper and lower receivers
• CMMG RML4 M-LOK handguard
• CMMG oversized ambidextrous charging handle
• Ambidextrous safety selector
• CMMG RipBrace
• Five-position enhanced receiver extension
• Magpul MOE pistol grip
• Mil-spec single-stage trigger
• Burnt Bronze Cerakote finish

Specifications

• Manufacturer: CMMG
• Model: Banshee 300 Mk17
• MPN: 92A17DA-BB
• UPC: 810046231623
• Caliber: 9mm
• Action: Semi-Automatic
• Operating System: Radial Delayed Blowback
• Barrel Length: 5"
• Barrel Material: 4140 Chrome-Moly
• Barrel Finish: Salt-Bath Nitride
• Muzzle Thread: 1/2x28
• Muzzle Device: Thread Protector
• Handguard: CMMG RML4 M-LOK
• Upper Receiver: Forged 7075-T6 Aluminum
• Lower Receiver: Forged 7075-T6 Aluminum
• Magazine: SIG P320/M17 Pattern, 21 Rounds
• Brace: CMMG RipBrace
• Pistol Grip: Magpul MOE
• Trigger: Mil-Spec Single Stage
• Finish: Burnt Bronze Cerakote
• Weight: Approximately 4.6 lbs.

The Mk17 Configuration

The Mk17 designation is the most important identifier when comparing this Banshee with other CMMG 9mm platforms. It combines the company's Radial Delayed Blowback action with a receiver built around SIG P320/M17-pattern magazines, while the Series 300 specification adds the RipBrace, ambidextrous controls, RML4 handguard, and Cerakote finish.

That combination defines the 92A17DA-BB more accurately than simply describing it as a compact AR-style 9mm pistol. Its operating system, magazine interface, 5-inch threaded barrel, and Series 300 component package are the factory features that distinguish this particular Banshee configuration.

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