With my two forged AXTS lowers the mag catch buttons are longer and the mag catch spring is shorter. I think thier different on the billet ambi AXTS lower. When I had the billet one for T&E I never removed the mag catch.
RobS I'll see if I can get a picture of one out of one my lower next to a standard USGI style one. I think they had to make it longer to get it in the right spot so that it pushes up on the drive rod which then pushes up on their bolt catch. Their bolt catch is a little different too.

