The Best Ar 15 Lower Drawing References. First off, i need to say that i didn't design the item or the process i followed, and without the excellent instructions and drawings by mr. Your only sorce for ar 15 lower parts exploded.
The magic of the internet. .5 dimensions are in inches 3940 broad st. You will have to pick out the information about the fire control pocket and hole dimensions, but the drawings are very comprehensive and easy to plug into a cnc.