The Umarex HK UMP Magazine is a spare high capacity mag for the UMP Competition AEG. This polymer construction magazine is a winding design for easy loading and maximum ammo capacity.
This mag fits the HK UMP Competition series only. It will not fit other high end models such as the UMG.
Umarex HK UMP 400 Round Hicap Mag Features:
-Top Door for Easy Loading
-400 Round Capacity