HK UMP 400rd Airsoft High-Cap Magazine

Short on HK UMP AEG mags? We've got five on it! Pick up an extra 400-round high-capacity magazine for your Elite-series HK UMP airsoft AEG and stay in the game. Don't be the player making the walk of shame back to the staging area because you didn't bring enough mags. Licensed Trademark of Heckler & Koch.