Yes, you have to drill and tap it. I had my gunsmith do it while I was on vacation so the M4 would not be down out of my use. When I first used it I was supprised how easy one can close the bolt now. I like it.
I just also contacted 3 Gun Gear for there 8 round Side Saddle. I do have the Tac-Star Side saddle right now but I don't like the way it get rid of the trigger pin. So I will see how it works with the 3 Gun Gear sidesaddle.
[ 04-03-2005, 05:10 AM: Message edited by: RABMP5 ]