Our take: This Umarex factory original mid capacity magazine works perfectly with the H&K-licensed UMP 45 AEG submachine gun. Manufactured by S&T and constructed out of high-strength polymer, this magazine holds up to 120 rounds. It feeds flawlessly even under the most strenuous simulated combat conditions.
Compatibility: This magazine is ONLY compatible with the S&T-manufactured Umarex HK UMP 45 AEG
Magazine Capacity: 120 rounds
Construction: Polymer Shell and Internals