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CMMG 5.7X28mm 8in Banshee Upper Group Receiver Up to 15% Off w/ Free Shipping — 3 models

CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Midnight Bronze, 57B88BD-MB
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Coyote Tan, 57B88BD-CT
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Tungsten, 57B88BD-TNG
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Midnight Bronze, 57B88BD-MB
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Coyote Tan, 57B88BD-CT
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Tungsten, 57B88BD-TNG
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Midnight Bronze, 57B88BD-MB
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CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Midnight Bronze, 57B88BD-MB
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Coyote Tan, 57B88BD-CT
2 of 6 images
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Coyote Tan, 57B88BD-CT
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Tungsten, 57B88BD-TNG
3 of 6 images
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Tungsten, 57B88BD-TNG
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Midnight Bronze, 57B88BD-MB
4 of 6 images
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Midnight Bronze, 57B88BD-MB
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Coyote Tan, 57B88BD-CT
5 of 6 images
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Coyote Tan, 57B88BD-CT
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Tungsten, 57B88BD-TNG
6 of 6 images
CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Tungsten, 57B88BD-TNG

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Questions & Answers
Does this come with the conversion mags? If not do you carry those separately? Expert Answer

The CMMG 5.7X28mm 8in Banshee Upper Group Receiver does not come with conversion magazines. The conversion magazines can be found at the link below.
https://www.opticsplanet.com/cmmg-mk4-ar15-5-7x28mm-10rd-magazine.html

by Hunter, Gear Expert, November 28, 2022
Does it come with a bcg Can you answer this question?
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Customer Reviews
Most Recent Reviews
awsome upper by Billford, July 17, 2025
Love the upper beautiful color great fit, and finish awesome shooting experience very low recoil 100% recommend optics planet is top-notch would always highly recommend them
Read 1 Review
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Product Info for CMMG 5.7X28mm 8in Banshee Upper Group Receiver

Designed to provide superior ballistics and less felt recoil than most pistol caliber personal defense weapons, 5.7x28mm has quickly become one of the most popular chamberings in the PDW space. With the 8 BANSHEE upper group you can build the PDW AR15 of your dreams. Compatible with either CMMG Mk57 lowers or a standard AR15/Mk4 lower (when used with CMMG 5.7 AR Conversion Mags).image

WARNING: California`s Proposition 65

Specifications for CMMG 5.7X28mm 8in Banshee Upper Group Receiver:

Manufacturer: CMMG
Caliber: 5.7x28mm
Overall Length: 16.5 in
Barrel Length: 8 in
Barrel Profile: Medium Tapered
Barrel Twist Rate: 1-9
Firearms Threads Per Inch: 1/2x28
Muzzle Device: CMMG Zeroed Linear Compensator
Fabric/Material: 6061-T6 Aluminum
Gun Rail: M-LOK
Gun Make: CMMG
Weight: 2.9 lb
Magazine Included: No
Mount Type: M-LOK

Package Contents:

  • CMMG 5.7X28mm 8in Banshee Upper Group Receiver

CMMG 5.7X28mm 8in Banshee Upper Group Receiver Orderable Models

List of Orderable Models

  • CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Midnight Bronze, 57B88BD-MB , MPN: 57B88BD-MB , UPC: 810097504417 , Code: 2CM-URC-CP9-57B88BD-MB
  • CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Coyote Tan, 57B88BD-CT , MPN: 57B88BD-CT , UPC: 810097504400 , Code: 2CM-URC-CP9-57B88BD-CT
  • CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Tungsten, 57B88BD-TNG , MPN: 57B88BD-TNG , UPC: 810097504448 , Code: 2CM-URC-CP9-57B88BD-TNG

CMMG 5.7X28mm 8in Banshee Upper Group Receiver Unavailable & Discontinued Models

List of Unorderable Models

  • CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Charcoal Green, 57B88BD-CG , MPN: 57B88BD-CG , UPC: 810097504394 , Code: 2CM-URC-CP9-57B88BD-CG
  • CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Titanium, 57B88BD-TI , MPN: 57B88BD-TI , UPC: 810097504431 , Code: 2CM-URC-CP9-57B88BD-TI
  • CMMG 5.7X28mm Banshee Upper Group Receiver, 8in, Sniper Grey, 57B88BD-SG , MPN: 57B88BD-SG , UPC: 810097504424 , Code: 2CM-URC-CP9-57B88BD-SG
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