Iok took something out of warehouse 4 (A banned weapon).
He caught Naze carrying the Tekkadan weapon (A banned weapon).

Why take out a banned weapon, to then apprehend someone else for carrying the same class of weapon?

It'd make sense if Iok was framing Naze by framing him but that wasn't necessary at all. Iok wasn't going into combat. Holding onto something illegal doesn't look good when you're calling out a civilian for doing the same thing.