after shooting my new saiga12 this weekend it was having difficulty cycling. i had to open the gas plug far beyound where it should have been. did some reading about saiga conversions and there are several different barrel styles 4, 3, 2, 1 port barrels. after looking at the ports i saw 1 and a half holes as the second one was partially blocked. so this evening i decided to get in there and do some monkeying with it. after removing the gas block i found this... 4 ports!! 2 were completly blocked off by the small hole in the gas block. 1 was partially blocked the only ones i could see were the two side ones!! once you take the handguards off and remove the gas block you can see how the rooskies drilled the gas hole for the ports. they drilled a large hole in the block hidden by the hand guards then through that a much smaller hole to access the gas ports in the barrel. the block in the pics below are of the bottom view of the gasblock i drilled out both holes with a 3/8 inch bit. i used my drill press . using a hand drill woulda been a pain since there is no way i coulda keep it straight enoughjust holding a wobbly drill. anyway, after getting it all back together 3/8 inch was the perfect size. now all four gasports are open. if its still not cycling reasonably i will open the ports to 5/64 inch. but i think this will fix the issue. hopefully next weekend i can try it out.