Quick Change Uppers(QCU)


  • Upper Receiver machined from 7075 Billet Aluminum
  • Handguard machined from 6061 Billet Aluminum
  • Full Auto rated Bolt Carrier 9310 Steel
  • Muzzle Device: 4 port “X-Brake” featuring four 1″ x 1/4″ ports and an 11 degree target crown
  • Fluted barrel with Fat Ramp(single feed ramp)
  • Adjustable gas block
  • Suppressor optimized charging handle
  • Available for all EVOLVE platform rifles
  • Exclusive to 51Fifty EVOLVE rifles, does not work with milspec rifles
SKU: QCU Category:

Quick Change Uppers(QCU)

The Quick Change Uppers(QCU) are for those who already have an EVOLVE-9, EVOLVE-15 or EVOLVE-47 rifle, pistol or SBR. Quick Change Uppers are built to take full advantage of the EVOLVE’s R.A.C. system. Now you can quickly swap out your upper for whatever purpose needed or just add more capabilities to your collection.


The EVOLVE Quick Change Uppers uppers come standard with our ARCA Rail handguards. The handguards feature a 45-degree red dot mounting area on both sides(red dot mounts sold separately). There are five rows of M-Lok and two QD cups, one on each side, which allow for sling attachment. The Quick Change Uppers feature an adjustable gas block and ambidextrous suppressor optimized charging handle. With a full auto rated bolt carrier and an X-Brake to round out the equipment. Out of the box these uppers are ready to lock on and go, just add sights or optics. With lengths from 7.5″ out to 20″ there is an upper ready to go for any circumstance. In short, whether you need it for hunting, precision, tactical, home defense or just a range work horse, there is an upper configuration for you.

All you have to do is choose your Platform/ Caliber/Length.


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