the reason y u don't use red is cause its permanint I bought a RT and you have to take the gas line off of the power tube my dad had to use his vice grips loloutlaner_0990 said:yep, you need a new hopper if you're dry firing. the only cause of that is no ball in the breach. as for the loosening, put some BLUE locktite on the screws. that way they will hold but you can still take it off. (don't use red).