Bolt Stick and major back pressure

[themish]

I run my mag on co2, ive got an aci expansion chamber and bottomline to the classic lvl 7 valve/bolt. My power tube has a spring spacer. My bolt is sticking, and when i try to remove the co2, there is so much backpressure that the turning action is very difficult and requires a lot of strength...moreso than my tippmann. Is this normal? How do i stop stick?

[athomas]

The bolt stick can be fixed by getting a spacer kit and using a longer spacer because your powertube spring is probably worn. Or it could be that the bolt spring is worn out. Replace it first. The bolt spring should extend almost 1/4" past the tip of the bolt when on the bolt.

The pressure you are feeling when removing the CO2 is a result of pressure and friction on the threads of the bottle in the ASA. The condition of the threads greatly affects the ease of turning. Applying a bit of grease to the threads will help by reducing friction as well.