So I am looking at picking up a spare Feed Latch for my Versa Max Tactical, and going through Brownells, I find that there are two different ones that fit the VM? One is Part #F400816 and the other is #F405391, I am pretty sure that I need the F405391, but the other one is almost half the cost. Can anyone tell me if the cheaper one will work, or can be made to work in the VM Tactical? I am planning on doing some of the Feed Latch mods if that makes any difference.