The company has designed and sold its own monolithic upper receiver called the Integrated Upper Receiver (IUR). The IUR features a unique one-piece design with a free-floating barrel. The IUR is offered with cold-hammer-forged barrels in lengths of 11.6 inches, 14.5 inches and 15.7 inches. The front sight base has been changed to the Colt Canada-designed folding front sight. The gun is a direct-gas-operated design based on the C8 carbine. The IUR comes standard with ambidextrous magazine catch and selector lever, but its charging handle has the C7A2 ambidextrous latch.

Colt Canada has manufactured and imported guns into the United States destined for law enforcement, specifically the LE6920, LE6933 and the AR6721. The rifles differ from the Colt Defense rifles only in that they have cold-hammer-forged barrels, the Canadian receiver extension and a full Canadian bolt carrier group. The receiver markings are the same with the exception of the “Made In Canada” under Colt Defense’s roll mark. Few of the semi-automatic rifles have made it into the commercial market and are highly sought as collector’s rifles.

The Canadian-made rifles are used by troops from Canada, Great Britain (special forces), Denmark, the Netherlands, Norway (special forces) as well as by Canadian Police Services, and there have been no issues with them—and that use includes extensive combat action. Due to importation restrictions, American gun owners will not likely see too many of the Canadian rifles, but they are a contender in the defense market, and remain one of the finest rifles in the service.