I don't begrudge you your perspective, but try to see it from my perspective: I've been around long enough to see what the lack of a Mil-Spec requirement can produce on this large frame platform. Manufacturers can and will do anything they want to their proprietary designs and it may or may not play well with all the variance that inevitably arises. This is yet another case of THIS IS NOT YOUR AR-15 at play, and it's not a flaw in ASC's design before you decide to go down that fruitless path. It's the variance coming from lower manufacturers and the fact that they don't have to adhere to a standard, which means that a ASC mag that will work perfectly with any of the MAINSTREAM large frame AR platforms it was designed for, is not surprising in the least when it doesn't work for a lower manufacturer that chose to do whatever they pleased with their design.