PRODUCT DESCRIPTION: Rated to 300psi, this is a 50 cubic centimetre firing tank with a 38.1mm (1 1/2") outer diameter and 108mm total length. The inlet is threaded in 1/8" BSP to accept any standard BSP fitting, and the outlet accepts 9/16" brass tubing or 20mm (3/4") conduit couplers. Anodized in red and with a laser etched logo and serial number.
These work unbelievably well. I built one into a kronos/raptorstrike rifle and it works great, It is capable of refilling as fast as you can pull the trigger.