Try different ammo before anything else.
I'm going to guess you're having trouble with the Norc ammo?
None of mine cycle reliably with it without the odd short stroke(ejects empty case but won't pick up another round). Works perfect with all others.
It did help when I changed the spring guide but try different ammo before you stress out over it.
Always treat an empty "click" like a live round though. Wait a minute with it pointed safely before you check the chamber for a round.
We still don't know if he actually shot the rifle when he experienced these stoppages. Until he explains further there is not point in giving advice.