Hey guys so I recently acquired and installed a kns adjustable gas piston for my saiga .308. I installed it but since Saiga .308 pistons have no shelf on them, I didn't get the correct length to stick out. Now, my rifle won't cycle at any setting of the kns piston. Can one of you tell me (as accurately as possible) tell me the length your piston sticks out from the bolt carrier? or maybe school me on the correct procedure for setting piston length if there is one? Any help would be greatly appreciated.