CP2 with external PCP tank

To make this modification, you need 4 parts:

1. PCP adapter
2. hose
3. valve
4. PCP bottle

PCP adapter

You need an adapter which makes possible to connect HP hose with 8mm quick connect to air rifle.

You can buy one in my shop. You screw it instead of CO2 12g cartridge and CO2 cartridge push screw.

HP hose with 8mm quick connect fitting

You need hose to connect air rifle adapter with PCP tank. At first, I bought less flexible hose with straight ends ... it works, but it was not nice to use.

Less flexible hose with straight ends (I bought "Straight 52inch")

I decided to buy a second hose, more flexible with an angled end. This is much better choice then previous one. Ignore "T" connector and bleed valve for a moment - it is nice to have, but it is optional.

More flexible hose with one angled end (I bought "40 Inch-100CM")

Bleeding valve for PCP hose (optional)

It is nice to equip PCP hose with a bleeding valve. You can safely discharge the hose and disconnect it. Without a bleeding valve, you need to dry fire air rifle, to drop pressure inside the hose.

Male quick connector with internal 1/8" thread (item: "Fill Nipple(F1-8NPT)")

Compressed air power source

At the end you need a source of compressed air. So you need a HP bottle, a pressure regulator and an adapter with quick connector.

PCP tank

I found this one, looks like nice quality bottle. Working pressure is 300 bar (4350 psi). I pump it to 4000 psi max with my hand pump. With 0,25 liter bottle charged to 4000 psi I can make 100-120 shots with power around 14 J. I have two tanks, one with capacity 0,25 liter and second one 0,5 liter, both are from the same shop.

Tank with capacity 0,5 liter (item: "0.5L Aluminum Tank").

Pressure regulator

This one is more expensive than a regulator with constant pressure but gives you the ability to adjust the output pressure using the hex key. You can also set "0 psi" pressure which is equal to closed valve - then you can disconnect hose from tank without need of emptying the tank. You can also buy more accurate pressure gauge, for example 0 to 1500 or 2000 psi. Remember to add some oil to adjuster screw housing, it works much smother and easier.

Pressure gauge (optional). You need one with M10x1 thread. Recommended max pressure 1500 psi, 2000 psi
(item: "1500psi-M10" or "2000psi-M10").

You can use fixed pressure regulator instead of adjustable pressure regulator. You need one with M18x1,5 thread to fit PCP tank. Good idea it to use additional ON/OFF valve.

Adapter

At the end you need a quick connect adapter installed at the output thread of the pressure regulator.

Adapter with female 8mm quick connector. (item: "8mm Female QD").