SRS magazines are heavy and don't hold anywhere near as many BBs as we would like them to, so anything we can do to increase this capacity and lighten the load is a good thing, right?
Introducing the Project Airsoft SRS dual magazine sleeve.
This allows you to carry two magazines at once on your rifle. One in the magwell, and the other on the side! Not only does this make fast and movement free reloads a possibility, but you're also saving a ton of weight. With magazine internals mounted, you're saving over half the weight vs carrying two normal SRS magazines.
All you do is take your existing magazine apart and rebuild it using this sleeve and you're all good to go.
Note: Only the sleeve is provided. Colour may vary slightly.