Tokyo Marui Type 89 / M4 Gas Blowback Rifle 35 Rounds Magazine for the Type 89 fixed stock and folding stock models as well as all the M4 platform gas rifles: M4A1 MWS, MK18 MOD 1, MTR-16, CQB-R, M4A1, URG-1.
 
Note: MWS gas magazines are also compatible with the Type 89 rifles.