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CMMG 9mm 5in Banshee Upper Group Receiver Caliber: 9mm Luger, Barrel Length: 5 in, w/ Free S&H

CMMG 9mm Banshee Upper Group Receiver, 8in, 1/2x28, Charcoal Green, 99B518D-CG
CMMG 9mm Banshee Upper Group Receiver, 8in, 1/2x28, Charcoal Green, 99B518D-CG
CMMG 9mm Banshee Upper Group Receiver, 8in, 1/2x28, Charcoal Green, 99B518D-CG
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CMMG 9mm Banshee Upper Group Receiver, 8in, 1/2x28, Charcoal Green, 99B518D-CG
CMMG 9mm Banshee Upper Group Receiver, 8in, 1/2x28, Charcoal Green, 99B518D-CG
2 of 2 images
CMMG 9mm Banshee Upper Group Receiver, 8in, 1/2x28, Charcoal Green, 99B518D-CG

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Questions & Answers
Does the muzzle break come off?

Figured it out it does come off you have to heat the muzzle a little bit to loosen the glue then it wrenches right off

by john, Verified Owner, September 3, 2025
will upper work on 10mm CMMG Banshee lower? Expert Answer

No. The CMMG 9mm Banshee Upper Group Receiver is designed to work with any standard AR15/Mk4 lower and 9mm AR Conversion Mags or CMMG 9mm pistol magazine lower platforms: Mk9 (Colt-pattern mags), MkGs (Glock-pattern mags), Mk17 (Sig P320 mags).

by Ethan, Gear Expert, January 30, 2023
View All Q&A You Have a Question? Ask!
Customer Reviews
Most Recent Reviews
CMMG ROCKS by joe bob, Verified Owner, February 8, 2025
Love it :) Came in great condition just wish I could buy the lower in here as well!!
Most Recent Reviews
CMMG 9mm Banshee by PARK, Verified Owner, September 7, 2024
CMMG 9mm Banshee Upper, the best 9mm UPPER, with the CMMG 9MM magazine, very perfect!
Most Recent Reviews
Quality Product by Barker, Verified Owner, March 16, 2024
If you see the letters CMMG then you know it’s quality. This is just my second item I purchased from CMMG. This will not be my last.
Read All 3 Reviews
Caliber:
9mm Luger
Barrel Length:
5 in
Barrel Profile:
Medium Taper
Gas System Length:
Rifle Length
Barrel Twist Rate:
1-7.5
Muzzle Device:
CMMG Zeroed Linear Compensator
Finish:
Cerakote
Color:
Charcoal Green
Handguard Length:
25 in
Condition Details:
Other
Condition:
New
Condition Quality:
Excellent

Code: 2CM-URC-CP15-99B518D-CG

MPN: 99B518D-CG

UPC: 810097505650

List: $924.95Save $84.96
$839.99

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for CMMG 9mm 5in Banshee Upper Group Receiver

If youre looking to build the most compact 9mm AR then look no further. CMMGs 9mm RDB uppers feature uncompromised design and engineering with styling that is never mistaken for something else. Having more options is always better, like what magazines you would like to use. 9mm Uppers are designed to work with any standard AR15/Mk4 lower and 9mm AR Conversion Mags or our 9mm pistol magazine lower platforms: Mk9 (Colt-pattern mags), MkGs (Glock-pattern mags), Mk17 (Sig P320 mags).image

WARNING: California`s Proposition 65

Specifications for CMMG 9mm 5in Banshee Upper Group Receiver:

Manufacturer: CMMG
Caliber: 9mm Luger
Barrel Length: 5 in
Barrel Profile: Medium Taper
Gas System Length: Rifle Length
Barrel Twist Rate: 1-7.5
Muzzle Device: CMMG Zeroed Linear Compensator
Finish: Cerakote
Color: Charcoal Green
Fabric/Material: 4140CM
Gas Block Journal Size-Diameter: .750 in
Handguard Length: 25 in
Gun Rail: M-LOK
Gun Type: Rifle
Gun Make: AR Platform
Gun Model: Universal
Weight: 4.3 lb
Magazine Included: No
Condition Details: Other
Condition: New
Condition Quality: Excellent
Mount Type: M-LOK
Threads per Inch: 1/2x28

Package Contents:

  • CMMG 9mm 5in Banshee Upper Group Receiver

What firearm models does the manufacturer say CMMG 9mm 5in Banshee Upper Group Receiver is compatible with?

The manufacturer says that CMMG 9mm 5in Banshee Upper Group Receiver is compatible with Universal

CMMG 9mm 5in Banshee Upper Group Receiver Orderable Models

List of Orderable Models

  • CMMG 9mm Banshee Upper Group Receiver, 8in, 1/2x28, Charcoal Green, 99B518D-CG , MPN: 99B518D-CG , UPC: 810097505650 , Code: 2CM-URC-CP15-99B518D-CG

CMMG 9mm 5in Banshee Upper Group Receiver Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, CMMG 9mm Banshee Upper Group Receiver, 5in, Midnight Bronze, 99B17FD-MB , MPN: 99B17FD-MB-DEMO , Code: 2CM-URC-CP15-99B17FD-MB-DEMO
  • DEMO, CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Tungsten, 99B17FD-TNG , MPN: 99B17FD-TNG-DEMO , Code: 2CM-URC-CP15-99B17FD-TNG-DEMO
  • USED, CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Armor Black, 99B17FD-AB , MPN: 99B17FD-AB-EDEMO , Code: 2CM-URC-CP15-99B17FD-AB-EDEMO-US-C
  • DEMO, CMMG 9mm Banshee Upper Group Receiver, 5in, Sniper Grey, 99B17FD-SG , MPN: 99B17FD-SG-DEMO , Code: 2CM-URC-CP15-99B17FD-SG-DEMO
  • DEMO, CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Armor Black, 99B17FD-AB , MPN: 99B17FD-AB-DEMO , Code: 2CM-URC-CP15-99B17FD-AB-DEMO
  • USED CMMG 9mm Banshee Upper Group Receiver, 5in, Charcoal Green, 99B17FD-CG, EDEMO1, Condition Fair, Other , MPN: 99B17FD-CG-EDEMO1 , Code: 2CM-URC-CP15-99B17FD-CG-EDEMO-OT-D
  • CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Armor Black, 99B17FD-AB , MPN: 99B17FD-AB , UPC: 810097505711 , Code: 2CM-URC-CP15-99B17FD-AB
  • CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Tungsten, 99B17FD-TNG , MPN: 99B17FD-TNG , UPC: 810097505773 , Code: 2CM-URC-CP15-99B17FD-TNG
  • CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Midnight Bronze, 99B17FD-MB , MPN: 99B17FD-MB , UPC: 810097505742 , Code: 2CM-URC-CP15-99B17FD-MB
  • CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Titanium, 99B17FD-TI , MPN: 99B17FD-TI , UPC: 810097505766 , Code: 2CM-URC-CP15-99B17FD-TI
  • CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Sniper Grey, 99B17FD-SG , MPN: 99B17FD-SG , UPC: 810097505759 , Code: 2CM-URC-CP15-99B17FD-SG
  • CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Coyote Tan, 99B17FD-CT , MPN: 99B17FD-CT , UPC: 810097505735 , Code: 2CM-URC-CP15-99B17FD-CT
  • CMMG 9mm Banshee Upper Group Receiver, 5in, 1-10 Twist, 1/2 X 28 TPI, 13.7in, Charcoal Green, 99B17FD-CG , MPN: 99B17FD-CG , UPC: 810097505728 , Code: 2CM-URC-CP15-99B17FD-CG
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Last updated 2026-10-28 UTC.