Reinforced metal frame withstands rigorous use Compatible with WE M4/SCAR/ASC/PDW gas rifles Features a blank-fire mode which disables the bolt top function Does not work with older closed bolt model AWSS systems Great choice for use in military or law enforcement training In the Box 1X Gas Magazine Specifications: Brand WE Tech Build Metal Frame, Internals Magazine Capacity 30 Rounds Propellant Green Gas Compatibility Open Bolt M4/SCAR/ASC/PDW airsoft GBBRs Color Tan California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov