The Novritsch SSR90 is a fantastic airsoft P90 AEG, but it can be difficult to seat magazines due to the design of the upper receiver. Well not any more...
Enter the Project Airsoft SSR90 Upgrade Magazine Base Plates.
These Base Plates simply replace the existing ones for you P90 magazine. They're compatible with ANY P90 magazine, but they're only designed to work with the SSR90 rif.
The reason why these work is there's a small amount of extra space between the magazine and the upper receiver which causes the magazine not to sit perfectly over the feed tube on the hop unit. These base plates remove that extra space while moving the magazine down slightly on the upper receiver to the magazine now sites flush and snaps in without any extra effort.
Note: Colour may vary slightly.