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Firearm Reviews

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In our full review of the Colt Canada Integrated Upper Receiver (IUR) AR15 style rifle we cover the pros and cons of the rifle. The IUR is the civilian semi automatic version of the Canadian Military C8 service rifle. The upper receiver is a one piece design that has an integral handguard, making the barrel require specialized tools for removal. While this video does focus on the IUR, most of the same pros and cons are also found in Colt Canada's (Diemaco) new Modular Rail Rifle (MRR). We feature a mixture of standard and slow motion footage in this review to show the workings of the IUR with high speed footage, along with GoPro footage from our backpack mount for first person shooting footage.

The specs of the IUR are;

  • 5.56 NATO chambering, can also fire .223 Remington.
  • Floating barrel system
  • Pinned on low profile gas block
  • Mil-Spec hard anodized black
  • IUR is marked COLT CANADA 2C085 and NATO on the rail
  • Straight gas tube to increase firearm life and ease of installation
  • Cold hammer forged 15.7” chrome lined barre, phosphated to Mil-Spec with improved integral forged carbine chamber. 1/7” twist RH/ 6 groove NATO approved bore.
  • C9A2 Type flash hider.
  • Full top (39 slot) and bottom (20 slot) rail and the grenade launcher recoil lug
  • The side rails are partially railed with 10 slots, and a steel insert quick detach (QD) sling fitting on each side
  • Rail slots are numbered with laser engraving;
  • The rails are NATO STANAG 4694 spec and are back compatible with MIL-STD-1913 accessories;
  • Protected low profile gas block
  • IUR has a hardened steel insert for the cocking handle latch to resist wear with enlarged tactical latches