I installed an (supposedly) m16 type ported-cylinder into my AK74, since it has a 510mm after-market barrel. I installed it correctly (cylinder away from nozzle yes?). It is 1mm or so shorter than the original (non-ported) cylinder so I pushed it all the way forward. I am asking this: do ported cylinders cause a drop in FPS to gain ROF? Am I going to get barrel suck (myth?) and is this too-short cylinder going to screw anything up? I will hopefully chrono my gun tomorrow to find out (was shooting exactly 353 w/.2). I guess more than anything I'm looking for feedback. This is the first gun I haven't simply sold after having my fun with it.
Cheers.