Hey fellas, I am currently deployed and have started working on a "TOY that I picked up while out and about.  My question is... What is the minimum distance from the end of the muzzle that the gas port can be for the AK 47 to cycle properly??  If I bring back the gas port  1.5 or 2 inches what size gas port hole should I drill, and dose it need to be tapered into the barrell like the original.  Thanks a bunch.  Mark.

Cool, I will post there too as I have my project on hold untill I find out what the popular concensus is.