Having to bring an hallen key with me is a joy killer.
The thing is well made for what it is and it's purpose but could be a lot better simply by replacing this stupid twist cap. To find the right angle to get darn thing in place is killing my soul, made me swear... Now I'm going to hell because of umarex.
I always buy at least a spare mag for my guns to keep co2 warm in my pocket and which em, this way all my shots are power shots.