F5 MFG HK-MP5 DRUM MAGAZINE
F5MFG MP5 50 round drum mag has been in development and testing for over 2 years. We’ve found that mag well dimensions vary from different manufactures just enough to make a precision machined part fit loose in one manufacturer and tight in another (HK for example).
Compatible with these manufacturers:
Heckler and Koch
Zenith / MKE Firearms