Additional Info CMMG BANSHEE 300 PSTL 5" 9MM BLK
UPC 816422025510
MPN 99A172F-GB
Model MkGs Banshee

CMMG Banshee 300 MKGS 9mm 33 Round Magazine 99A172F-GB

Out of Stock


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Compact, powerful, reliable. The CMMG Banshee 300 MKGS is a semi-automatic tactical pistol that will change how you shoot on the range or in defense. Featuring a 33 round magazine, ambidextrous charging handle, single-stage trigger, and more.



The Banshee is the featherweight of CMMG's lineup, with the shortest barrels in their caliber. Its design gives you the firepower you need in a compact and lightweight platform, ideal for plinking, competition shooting, and serious personal protection. The Banshee features a 6-position CMMG Rip brace, Magpul MOE pistol grip, and RML handguard with a top rail and M-Lok at the 3, 6, and 9 o'clock locations. It has a mil-spec, single-stage trigger, an ambidextrous charging handle, a selector, and a sling plate. Banshee pistols feature a premium Cerakote finish on the receivers and handguard. The MKGS Banshee 300 in 9mm Luger has forged upper and lower 7075-T6 aluminum receivers. This model has a Graphite Black cerakote finish, 5" barrel, CMMG Ambidextrous charging handle, laser engraving on the lower receiver, and includes a 33-round magazine.


  • Brand: CMMG
  • Category: Tactical Pistols
  • Caliber: 9mm Luger
  • Model: Banshee 300
  • Series: MKGS
  • Stock Finish: Black
  • Action: Semi-Auto
  • Barrel Length Range: 5" to 5.99"
  • Sights: None, Optic Ready
  • Capacity: 33+1
  • Muzzle: Threaded
  • Grips: Black Magpul MOE
  • Hand: Right
  • Handguards: M-LOK Free Float
  • OAL: 18.90"
  • Receiver Finish: Graphite Black Cerakote
  • Receiver Material: 7075 T6 Aluminum Forged
  • Safety: Ambidextrous
  • Stock Description: CMMG 6 Position RipBrace
  • Stock Material: Synthetic
  • Thread Pattern: 1 / 2"-28 tpi
  • Trigger: Single-Stage
  • Twist: 1:10"
  • Weight: 4.63 lbs
  • Barrel Description: 4140 Chrome Moly Medium Taper
  • Barrel Finish: Black Nitride
  • Barrel Length: 5"
More Information
MODEL Banshee 300 MKGS
TYPE Semi Auto Handguns
UPC 816422025510
Categories: Semi Auto Pistols
Condition: New
Manufacturer: CMMG
Model: MkGs Banshee
Caliber: 9mm Luger
SKU: 816422025510
MPN: 99A172F-GB
UPC: 816422025510
Vendor: Gunprime
Reviews (4)
By gilli8 on 07/05/21

the whole transaction was smooth as silk. OUTSTANDING!!!

By Love it. on 06/28/21
Love it.

Bought the CMMG Banshee 300 in 9mm and love. Was looking for a new “homeland security” tool and this surpasses my expectation. Gunprime was easy to work with. select your weapon, choose a local gun dealer from their drop down menu, pay, wait for a call from local dealer, pay the local transfer fees, go shooting.

By AJ on 05/12/21
Get it while you can

Had it for two weeks but coming from a cmmg resolute 300 I'm very happy with the quality of this product for the banshee lineup. Make sure to properly lube before use. Had some failure to fire right out the box but after looking it through and running some oil it was properly running without a hiccup at the end of my initial out the box test on a case of American eagle 124gr 9mm. I'm still giving it full marks for quality alone and cmmg lifetime warranty if anything else needs changing. Added kak flash can, single point sling, backup polymer sights with Sig romeo7s 1x22. Still feels light and great in the hand. Highly recommended. Thanks Gunprime for the lightning fast shipping to my FFL.

User uploaded images:

By Austin on 06/17/20
Excellent Service

Easy online ordering, amazingly rapid delivery, excellent customer service.

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