I am looking to mount a bottom tac rail (1913 picatinny) for a foregrip on my Stag 3g Upper. I have tried using a universal rail with mounting bolts but not only do the holes not match up but also the screws are too small for the holes. Im wondering if anyone else has ran into this issue and also if there is a specfic brand rail I should be using. Thanks in advance
-Tom
-Tom