SKU CSSI|CA99B9A0FAB Category

CMMG Fixed Ejector Upper Group for BANSHEE Mk4 Mk9 Mk17 & MkGs 9mm Luger 8″ Barrel Armor Black

CMMG Fixed Ejector Upper Group for BANSHEE Mk4 Mk9 Mk17 & MkGs 9mm Luger 8″ Barrel Armor Black

$894.00

3 in stock

Combining carbine-like ballistic performance and compact size this 8” BANSHEE™ upper group is what you need for the ultimate 9mm AR. Not only does this 9mm upper utilize CMMG®’s radial delayed blowback technology but shooters also have a number of lower/magazine pairing options. 9mm Radial Delayed Blowback uppers are designed exclusively to work with CMMG MkGs Mk17 or mil-spec AR15 lowers using our 9mm Conversion Magazines. Available in different Cerakote finishes all CMMG® Upper Groups come complete with bolt carrier group and ZEROED™ accessories including:

Features:

  • Platform: Mk4 Mk9 Mk17 MkGs
  • Caliber: 9mm
  • Operating System: Fixed Ejector Radial Delayed Blowback
  • Barrel Length: 8
  • Barrel Twist: 1:10
  • Barrel Contour: MT
  • Barrel Material: 4140CM SBN
  • Barrel Twist: 1:10
  • Muzzle Device: CMMG ZEROED Linear Compensator
  • Muzzle Thread: 1/2 X 28
  • Gas Port Location: N/A
  • Gas Block: N/A
  • Upper Receiver: Billet 6061 T6 Aluminum
  • Hand Guard: CMMG EML7 M-LOK
  • Finish: Cerakote Standard
  • Charging Handle: CMMG ZEROED Ambi
  • Weight: 3.0 lbs
  • Length: 16.5"

 

Additional information

Upc

840442505783

Manufacturer

CMMG

Manufacturer part number

99B9A0F-AB

Shipping weight

3.379

FAQ

BJ Firearms LLC is a federally licensed firearms business focused on providing quality firearms, accessories, and related services while promoting responsible ownership, education, and community engagement.

The company was founded to serve firearm enthusiasts with knowledgeable service, real-world experience, and a commitment to professionalism and safety.

We focus on real experience, personalized service, hands-on product knowledge, and community involvement — not just sales. Our goal is to help customers make informed decisions and feel confident with their equipment.

Yes. We operate as a federally licensed firearms dealer (FFL), following all applicable federal, state, and local regulations.

Yes. We partner with trusted suppliers to provide quality products and reliable sourcing.

Yes. We partner with content creators and industry professionals to provide real-world insights and experiences.

We work with everyone — from first-time buyers to experienced enthusiasts. Education and guidance are a big part of what we do.

We offer firearms, accessories, gear, and related equipment depending on availability and customer needs.

Yes. We help customers evaluate their needs, experience level, and intended use to find the right fit.

Yes. Depending on the request, we can help source specific products or assist with custom configurations.

Yes. We actively engage in hands-on experiences, demonstrations, and community-related firearm activities when possible.

Yes. We support content that helps people learn about equipment, safety, and responsible firearm ownership.

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Customer Reviews

“Outstanding customer service.” I had a lot of questions before buying, and they walked me through everything without pressure. Super knowledgeable and easy to work with. You can tell they actually care about their customers.
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“Best experience I’ve had buying gear.” Professional, responsive, and honest. They helped me choose exactly what I needed without overselling anything. I’ll definitely be coming back.
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“Great people, great service.” Very down-to-earth and easy to talk to. They explain things clearly and make sure you understand your options. Highly recommend, especially if you’re new.
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