Composed of metal and reinforced polymer to withstand rigorous use Compatible with Tokyo Marui M4s, NSWC-Crane SEALs. M4 CQB-R, M4A1 SOCOM, SCAR-L and HK416D Carries a capacity of up to 430 rounds Newly designed follower fires till the last round Uses a winding wheel that provides tension to consistently feed BBs In the Box 1X 430 Round High Capacity Magazine Specifications: Brand Tokyo MaruiBuild Polymer / MetalMagazine Capacity 430 RoundsCompatibility TM M4s, NSWC-Crane SEALs. M4 CQB-R, M4A1 SOCOM, SCAR-L and HK416DColor Black California Proposition 65 Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov