Madbull XM Charger XC03 Portable 12g Co2 Adaptor with Adjustable Pressure Regulator and Read-Out MeterMadbull XM Charger XC03 Portable 12g Co2 Adaptor with Adjustable Pressure Regulator and Read Out Meter. Made out of steel and aluminum. Super rigid construction. Hard anodized finish protects from wear and corrosion. Integrated precision pressure gauge. Readout shows from 0 PSI to 1,200 PSI. Built in adjustable pressure valve with knurled adjustment knob. This charger allows you to use regular 12g CO2 powerlets to charge M203 type 40mm shells., no