Hi, I recently bought a Hill pump with optional Dry Pack (a moisture filter) and I am using it to charge my Career 707 Carbine. The pump is made in Sheffield, England, but the company delivers worldwide and you can probably get it in some of the big mail order specialists in USA. It's a lot more expensive than any of the other pumps on the market, but it's a quality piece of kit. Spare seals and filters are readily available and service from the company is excellent. There's a video on Pyramid Air's web site to do with the Benjamin Discovery which shows a middle aged guy demonstrating the correct technique for using a pump. Compared to me he's just a kid, and I find putting 300 psi of air into the Career pretty easy, and I'm no fitness fanatic :-). So don't be put off getting a pump - even if you just use it for topping up after you've filled from a bottle. Adios amigo. mick1