Colt Canada MMR: Modular Railed Rifle with M-Lok

Colt-Canada-MRR_logo

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.

Colt-Canada-MRR-Modular-Railed-Rifle



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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  • Jay

    Was not that interested in their IUR, but this one, Hell Yeah! I’m sure it’s a lot lighter up front.
    Love it!

  • Joshua

    Said from the get go Mlok was a better and more durable design than Keymod.

    Sadly we in the US will never see these. The other issue is I’m not a fan of monolithic designs as damaging rail takes the entire upper receiver out as well.

    • thedonn007

      The rail is removable.

      • Joshua

        Looks monolithic to me.

        • thedonn007

          My bad. Looks like you are correct, and in that case I agree with you.

    • Garfield3000

      Hey don’t be too bummed out. Unless you’re only excited about the Colt Canada rollmark, you can walk into any gun store and pick up any AR with a gucci free-float rail and Magpul junk and have the same thing

    • jono102

      Has any manufacturer trialed or proven Mlok, Keymod or similar concept with a 40mm launcher?

  • DAN V.

    Looks nice. My dodge was made up there as well.

  • nobody

    Oh look, another AR-15.

    >Expect to see a lot more of these rifles at Shot Show next month

    Believe me, I don’t think anyone is expecting otherwise.

  • Armchair Command’oh

    Wait…Canadian civilians can have AR-15s? Am I missing something?

    • kgallerno

      Yup we sure can. I have two in my locker. Also a Tavor and a CZ858. We also can get some guns you Yanks can’t.

    • Paladin

      Our gun laws are not quite as bad as, say the UK or Australia. In broad strokes our laws classify firearms into three categories: non-restricted, restricted, and prohibited.

      The prohibited category includes full-autos, converted autos (guns that were once full-auto but aren’t any more), any firearm deemed too easy to convert to full-auto, handguns in .25 or .32 calibres or with barrels less than 106mm (4.2″), and any firearm named in the law as prohibited or any variant of such a named firearm (notable examples include the FAL and AK). Prohibited firearms are, as the name implies, prohibited. People who owned them prior to their prohibition were grandfathered in, but aside from certain narrow exceptions they are the only civilians who can own them.

      Restricted firearms include handguns, semi-automatic centrefire firearms with barrels under 470mm (18.6″), any firearm with an overall length of less than 660mm (26″), and the AR15 or any variant thereof. Restricted firearms require a Restricted Possession and Acquisition Licence (which itself requires a two-day safety course and a background check) they must be registered with the Canadian Firearms Program. Storage and transportation requirements for restricted firearms are fairly stringent. Outside of certain special circumstances restricted firearms can only be used on sanctioned ranges. Until recently transporting restricted firearms required an Authorization To Transport from the provincial Chief Firearms Officer, however just this year authorization to transport for most uses was made a standard condition of the restricted licence.

      Any firearm that does not fall into either of the two previous categories is considered non-restricted. Non-restricted firearms require the basic Possession and Acquisition Licence, the requirements are similar to those of the restricted licence, though the safety course is only a single day. Storage and transport regulations for non-restricted firearms are less strict, and they can be used anywhere that is safe and not prohibited by law. For a time non-restricted firearms were required to be registered, but that registry has been ended.

      Other than that, magazines for centrefire semi-automatic rifles are limited to 5 rounds, while pistol magazines are limited to 10. In most cases a simple pop rivet blocking the magazine from accepting more than 5 or 10 rounds is sufficient. Suppressors are also prohibited.

      While I have to admit that hardly paints the picture of a bastion of firearms freedom it could be a whole lot worse, and the past few years have seen some, admittedly small, steps to reduce the regulatory burden. There are also quite a few of us motivated to build on that momentum.

      It’s not all bad news though, our import laws are significantly less strict than in the US. Aside from prohibited firearms we can import just about anything from just about anywhere. We also don’t have to deal with NFA taxes on short barrelled rifles or shotguns, making them quite readily available.

      • Armchair Command’oh

        Thanks for the primer. I guess I assumed ARs were banned since rifles like the AK are—foolish of me to assume any sort of consistency or logic in the law.

        Good luck with the gun rights campaign.

        • Paladin

          You’re welcome.

          If my experience with Canada’s firearms laws has taught me anything it’s never to expect anything resembling logic or consistency in the law. As a fun example, the Mossberg Blaze .22 rifle is non-restricted in Canada, while the Blaze 47, literally exactly the same rifle only put in a stock that makes it look like an AK is prohibited, based on the notion that anything that looks like an AK is an AK. Meanwhile my vz.58 sits in my safe happily non-restricted. It’s enough to convince a man that politicians and bureaucrats only exist because the people filling those seats in Ottawa didn’t have the sense to get a proper job.

          And so the fight for our rights goes on. Best of luck to you as well, I know Canada doesn’t have a monopoly on these sorts of people.

        • Anonymoose

          With Trudeau in charge, ARs and anything “fun” might be prohibited pretty soon.

  • EzGoingKev

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

    • Anonymoose

      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

    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).