I just ordered 10 10 rd john masen mags. i ripped them out of there rapper, and attempted to insert, just to see if they fit. to my dismay, they didn't. they were to wide, i think, and on the back of the mag were the little hump on the back is to wide and flat, compared to my factory mag. they don't insert all the way unless i slap them in, then it takes considerable force to work the mag catch and yank them out. they don't just drop free. are all masen mags like this? should i return them to midway and try to get a refund? or is there any way to fix this problem?