Colt Canada MMR: Modular Railed Rifle with M-Lok

Edward O
by Edward O

Canadian gun-mag Calibre has recently gotten a sneak peak at the latest update to the IUR platform: the Colt Canada MMR. The IUR has been available to LE and Mil for years, but just recently arrived in civilian hands this year.

IUR stands for Integrated Upper Receiver, also known as a monolithic receiver to everyone else in the world. This latest iteration replaces the side and bottom picatinny rail sections with M-Lok mounting space.

From the Calibre article:

The decision to select M-Lok over its chief competitor, Keymod, was credited largely to M-Lok’s preference among Colt Canada’s LEO and military customers. However, additional performance metrics such as tear-off strength and ease of manufacture were also taken into account.

They’ve also dropped the grenade launcher recoil lug, citing feedback from their SF users. For the first time Colt Canada is also offering factory cerakote and lighter profile barrels.

The IUR family of rifles still use the direct impingement gas system, but with a straight gas tube to keep everything inside the handguard. The barrel is attached by a proprietary system, although once you’ve got the tools and taken their armourers course its apparently a quick change system. The free floated barrel is guaranteed to shoot 1 MOA.

Expect to see a lot more of these rifles at Shot Show next month, hopefully with a variety of barrel length options. As a Canadian shooter who already owns one IUR, this bit of news was particularly encouraging:

Colt Canada will place priority on law enforcement and military procurement contracts, with potential civilian release of the MRR platform incumbent upon the level of interest generated in the civilian market.

If you wanted a slightly higher rez look at the rifle, here’s that first image again. Click for fullsize. I’m hoping we see more soon.

Edward O
Edward O

Edward is a Canadian gun owner and target shooter with a Bachelor's Degree in Journalism. Crawling over mountains with tactical gear is his idea of fun. He blogs at TV-Presspass and tweets @TV_PressPass.

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  • EzGoingKev EzGoingKev on Dec 14, 2015

    Is it just me or does this look like it has a midlength gas system?

    • Anonymoose Anonymoose on Dec 16, 2015

      @EzGoingKev I think you may be right. If they're not giving it an M203/AGLM attachment point, they might have just gone with a mid-length 16-incher.

  • Anonymoose Anonymoose on Dec 15, 2015

    I need this in a 16" 5.56 and .308 (LE901) and a 20" 5.56 and .308 (LE901 again). This looks like a much better setup than the LE6940 (unless you want running a Commando/Mk18 barrel, and even then they have a 6940 "3-gun version" that uses bolt-on rails, but only comes in 16", and there's only like 2 places on the planet that can change a 6940 barrel because of the fancy proprietary barrel nut).

    Also, I really like that they have an actual CTR and MIAD grip instead of the MOE or MOE-SL stuff or the Super-Stoc (which can't use a cheek-riser, such as the Larue RISR that works with AR charging handles). MBUS Pro sights would make this perfect, but that would be another $100 over the standard MBUS sights.

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