Not exactly, those glock mags are made specifically to work with a glock, the fact that other firearms can use them doesn't matter. The XCR-M pistol mags will have to show that they are made specifically for the XCR-M pistol (slight differences or modifications etc), just taking a 10 round 308 magazine and stamping pistol magazine on the side of it doesn't count. Take a look at the XCR-L pistol mags and compare them to an ar magazine, there are differences, but it just happens that they will still work in ar's etc.