Things I liked: great idea, love the valve so you can turn the tank off and remove when done shooting without having to empty tank.
Things I would have changed: ive been through 3 of these adapters and about 8 co2 tanks and 2 guns, cannot get any of these adapters to seal. wish i could, just been using the tiny cartridges
What others should know: wish i had a setup that worked, the upper tube that goes into the forestock wasnt long enough to seal in my guns and all the co2 would dump out once cartridge is punctured. and yes i had the adapter screwed on all the way