I just stumbled across the MR 556 on Sunday in a local shop. It had to come home with me to meet the rest of the family Now I just need an optic set up and a few other accessories. I'll be taking it out tomorrow and see how it runs I'll keep you posted.
They are 10 round LAR-15 "pistol" mags coupled together. A loophole of sorts around the normal 5 round magazine capacity legislation in Canada. Both LAR-15 .223 pistol mags and the couplers are available from Questar International. I believe the letter with the ruling about the legality of these mags is on the website somewhere as well.
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