What Bob said ^^^

If it were me, I'd take the muzzle device off, push the pins out with a punch and see what it looks like under there... if the pins are ok and they just drilled in the wrong location, I would see if I could get the pins tight at the correct (more rearward notches).... if there's not enough "bite", then get oversize pins (can even use the shank of cheap drill bits) ... line up the notches, make sure the sight is straight (most important part) and drill to the new size and re-pin.