Cause the KK is used to make the BCG a single shot item. Not meant for semi-auto So you're experiencing a super delayed cycling . Now if you're interested in selling it, i have an interest.
Also using steel case x39 should have no effect for cycling a semi-auto Ar. I know mine has no issues. As it's all i run.
The Kali Key simply drops into any mil-spec AR style rifle and removes it from the definition of an assault weapon as defined by The Assault Weapons Control Act. It works by converting any mil-spec, gas operated (non-piston), semi-automatic rifle into a straight-pull bolt action rifle, without requiring any milling or modifications to the gas system.