Compatible with use with CO2 Machined metal alloy construction Can be mounted in the grip of standard M4 airsoft rifles Regulator designed specifically for airsoft Includes a zip-tie tournament lock for airsoft fields Quick recharge rate at high and low pressure Accepts most standard HPA tanks The regulator is seated closer to the gun resulting in a faster recharge rateSpecifications: Brand Wolverine Airsoft Build Metal Alloy Compatibility HPA, SLC, CO2 Tanks Fitment Most M4 Series Airsoft Rifles Pressure Range 40 - 140 PSI Weight 0.31 lbs Length 4.25 Inches Color' BLACK 1X Storm In-Grip Regulator