Man, I was looking forward to getting an XCR some day but then when I heard that their 7.62x39mm conversion kit was NOT going to make use of existing AK-47 magazines, I said forget about it. Hopefully, the SCAR and Masada won't make that mistake.
I don't feel like buying expensive proprietary mags that may be around 30-60 bucks each. Same with the US Steyr AUG, if I can't get a version that takes m16 STANAG mags, forget about it!