Why is the hand pump the BEST way to fill a PCP?
In a word - control! You can stop at exactly the spot in the pressure curve your airgun likes. With a scuba tank, it's hard to stop at exactly the right point because the pressure rises so fast. Also, once a scuba tank or carbon fiber tank starts dropping in pressure, you cannot put more into a gun than is available in the tank. With a 3000 psi 80-cubic-foot tank, a pretty common size for a scuba tank, that happens pretty quick. When it does, you're stuck putting in less than a full fill for a great number of fills. Toward the end, you're only putting in enough air for a handful of shots before it's time to fill again. Not so with the pump, because you can go to the right stopping pressure each and every time. 

    Zhuji XinBiDa Pneumatic Equipment Co.,Ltd  is currently one of the largest producers of PCP accessories in the world and from these big producers we are on the market for the longest time. That's why we can offer you not only a top-of-the-line products, but also our extensive experience of  PCP hand pump, air filling adapter, paintball regulator and other machine parts. We are not only sell products but also our service.
     With high quality and reasonable price our factory developed very fast recently and we are honored to getISO9001:2015, authoried import & export license, RoHScertificates for our products, so that to guarantee quality, and in strict accordance with international quality system.
     We have professional experience of ODM/OEM design and develop in PCP hand pump and air filling for air gun/air rifle.So your customized order will be warmly welcome here. Our motto is: DO WIN-WIN business getting better and better. 
      In addition to the things described above, we also deal with machine parts, CNC machine parts. Auto Parts & Spare Parts. You may sent your CAD DRAWING, We can offer you price, so that you can compare with your current suppliers.