well guy's it is a standard aero m5 .308 ,looking at a regular latch not ambidextrous.i can locate the dpms part on the net ,i just seen for the most part have had better luck with armalite's mag catch in their build's was just resisting trying aero on the net ,they want to sell the whole lower kit ,which i dont need.it look's like armalite will sell just the catch only .