Correct Gas port hole size PLEASE

[jocrash]

Sorry guys, am new on the forum, can't find the right size of the gas port hole for a 7.5" barrel/upper for my new Kitty Kat my friend and I are assembling.We use the pigtail (but also have the standard gas tube if anyone thinks that better) but right now my rifle is only cycling halfway...and here in europe it's hard to find the right info, cetainly living like we do in Belgium, second worse country after Britain for law-abiding cititzens to legally own a gun...so if anyone can give me a link or just some plain info and size(s?)...Thanx a lot already ! BTW : has to work with standard 55 or 62 grains Wolf ammo in semi-mode.

[Spikes-Rep]

.082-.089 on the gas port, use the standard tube.

[jocrash]

Thanx a lot straight from europe , mailed it already to my buddy and hope to have fun on the range this weekend !