ZCI Stainless Steel 3/4 Cylinder (Type II)

Great part! Installed this into a g&g cm16 with no issues as well as fitting it in a Lancer Tactical v2 gearbox without issues. I personally didn't see any shavings or rough areas in my cylinder, but its still a good idea to do a close examination to check. I did a polish on mine and got some gunk off. It wasn't necessary(the thing is really shiny) But I did it anyways. Great investment!