CMMG Banshee 9mm Complete Upper Receiver - 8"

Manufactured by CMMG
SKU: 99B518D-AB
MPN: 99B518D-AB
Manufactured by CMMG
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Start your next pistol caliber carbine build the right way with the CMMG Banshee 9mm Complete Upper Receiver. This high-quality complete upper receiver transforms a compatible MK4, MK9, MK15, OR MKGS platform into a lightweight, soft-shooting PCC. It features an 8" Chrome Moly barrel with an MT contour and 1:10 twist for excellent accuracy. The 1/2x28 threaded muzzle comes equipped with a CMMG ZEROED muzzle brake that helps make follow-up shots easier. It comes outfitted with multiple upgrades, including a polymer dust cover, an ambidextrous charging handle, and an EML-7 M-LOK handguard.

  • Compatible with MK4, MK9, MK17, and MKGS
  • Chambered in 9mm
  • Radial delayed blowback
  • 8" barrel length, MT contour
  • 1:10 barrel twist
  • 4140 CM barrel material, salt bath nitride finish
  • CMMG ZEROED linear compensator
  • 1/2x28 muzzle thread
  • Billet 6061-T6 aluminum upper receiver
  • CMMG EML7 M-LOK handguard
  • Black Cerakote finish
  • CMMG ZEROED ambidextrous charging handle
  • Weight: 3.0 lbs
  • Overall length: 16.5"
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Barrel ContourMedium Taper
Barrel Length8.0
Barrel Material4140 Chrome Moly Steel
Caliber Gauge9mm Luger
Gas System TypeRadial Delayed Blowback
Muzzle DeviceCompensator
Twist Rate1:10
Weight3.0 lbs
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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