Mini ball lock co2 regulator.  Made of machined, anodized aluminum and uses 3/8″ threaded 16 gram co2 cartridges.  Includes a ball lock quick disconnect.  Since it has an MFL fitting, you should be able to swap that out for a pin lock QD.

This is similar in function to handheld CO2 chargers with the notable difference that it includes a regulator.  The regulator lets you set a specific pressure.

Use for portable dispensing of your keg of homebrew.

Home Brew Premium Regulated CO2 Charger Kit With Gas Disconnect

Also Consider: Leland Mini CO2 Regulator – Review | Portable Draft Serving Options