Printable AR style Catch and Release

M4 T-nut M4 screw, about 30mm Spring can be either stock AR style mag catch spring or the dart spring from this: https://www.dollartree.com/plastic-dart-shooter-playsets/263063

Print the button of your choice laying down and the catch on it's side. drill out holes if needed. Insert the M4 T nut into the button and the screw into the catch, screw most of the way and insert into receiver. Insert the spring onto the screw, press the button onto the screw, depressing the spring, and turn the screw on the mag catch side. Button depth can be adjusted and set by turning the screw out on the catch side, and then adding the button at the needed point before you screw it back in.