I bought an internal stock adapter from dph, and grinding off the tang is simple enough, but directly above my pistol grip there are two pins riveted in. They are in the spot where I'm supposed to screw the adapter into the reciever.
I can't take the pins out because one of them is holding a small skinny spring that travels the
length of the reciever on the left hand side.
What am I supposed to do? All the instruction videos just say cut off the tang, but don't mention these pins.