[Tempted (Banned)]

The line may have a kink, it might have a slide that is partially blocked, it might be screwed too tight on the tank.

But this does sound like an LP/HP problem.

[justme-]

FWIW, back in the day I used to run a micro line remote coil - like similar to cocker hose size. Bought it from Ravi and never had shoot down from it restricting flow as one might think. Granted I wasn't shooting 15bps, but I couldn't out shoot the flow in my automag so it was more then enough for 8-9 bps.

[Scooterboy333]

I actually had that problem with my son's Alpha Black. If you screw in the on/off until it stops, it only let him get off 5-6 shots before it sounded like the tank was empty. I backed it off a bit and the problem was solved. We use 48/3000 HPA tanks

[cptnemo66]

Could a HPA reg even backflow co2?