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CMMG MK3 .308 Complete Upper w/ BCG - Stainless 18" Barrel - KeyMod Free Float Handguard

CMMG MK3 .308 Complete Upper w/ BCG – Stainless 18″ Barrel – KeyMod Free Float Handguard

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90 Day No-Hassle Returns We Pay Return Shipping

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

If you need to request a return, contact us at support@at3tactical.com 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 support@at3tactical.com. 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 support@at3tactical.com – we will do our best to make it right.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

The Mk3 is the perfect 308 WIN Upper Group for the tree stand or target range.

The Mk3 utilizes an 18? 416 stainless steel heavy taper barrel, and CMMG’s RKM15 KeyMod hand guard. Each Upper Group is covered by CMMG’s lifetime quality guarantee.

  • Caliber: 308 WIN
  • Barrel: 18” stainless steel 1:10 twist heavy taper profile
  • Muzzle: A2 compensator, threaded 5/8-24
  • Hand Guard: CMMG RKM15
  • Receiver: Billet 6061-T6 AL LR308 type
  • Gas port location: Rifle

Upper Group consists of:

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

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