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CMMG 9MM Complete Upper w/ BCG - 16" Barrel w/ A2 Front Sight

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You will receive fast, free shipping for all orders over $35

Shipping cost is $5.50 for orders under $35. We ship with UPS and USPS. 

Most orders ship out within 24 hours

You will receive tracking information immediately at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses.  

We have a 90-day no-hassle return policy. We pay return shipping.

If you need to request a return, contact us at and we will send you a return label

After 90 days, defective items will still be covered under the manufacturer’s warranty, where applicable.

Please refer to the product listing for warranty details. If you have specific warranty questions, contact us at We may direct you to pursue your warranty claim directly with the manufacturer.

Your satisfaction is our #1 priority

If you're dissatisfied with your purchase, in any way, please contact us at - we will do our best to make it right.

Product Options


The iconic Mk4LE Upper Group in 9mm Luger. Features a nitrided 16.1″ 4140 CrMo steel barrel in a M4 profile, which includes a “F” marked front sight base.

Upper Group consists of:

  • Upper Receiver Assembly (Upper Receiver, Ejection Port Cover, Forward Assist, Gas Deflector)
  • Barrel Sub-Assembly
  • Hand Guard and Barrel Nut
  • Charging Handle
  • Bolt Carrier Group


  • Caliber: 9mm
  • Barrel: 16.1″, 1:10 twist, M4 profile, 4140CM, SBN
  • Muzzle: A2 comp., threaded 1/2-36
  • Hand Guard: M4 type 2-piece hand guards
  • Receivers: Forged 7075-T6 AL M4 type upper

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