Originally Posted by jsamarin

If you look closely at the stock piston, the holes are actually tapered. No way to re create this with a different piston IMO. The thing I find weird though, it to have the piston in correctly, the numbers must face down! I personally put them in up side down when I first built my kit because I've always put the number up so I can see what piston i have in there if I forget. Is this correct TLR guys????

Note: The rtr and roller both have the piston number facing down, so I assume that is the correct way for them to be installed