The tech of Broforce Airsoft has a nice Maple Leaf upgrade set consisting of a Crazy jet barrel (97mm), Autobot Hop Up Rubber 50° and complete Hop up Chamber + Wheel.

The pre-assembled drop in upgrade kit has been specially developed for the Hi-Capa 4.3 from WE and Tokio Marui. This upgrade set gives a huge high performance boost to your GBB replica. Because this set is delivered pre-assembled, this upgrade can be installed within 2 minutes.