Home HPA Engines, FCU's & Trigger Boards Gorilla Fusion Engine Trigger Board View basket “Kross Airsoft Design Hi-Capa To M4 HPA Adapter – Pre Built” has been added to your basket. Gorilla Fusion Engine Trigger Board£34.99 4 in stock Gorilla Fusion Engine Trigger Board quantity Add to basket Categories: Engines, FCU's & Trigger Boards, HPA Description Trigger Board made for Fusion Engine to have a faster trigger response. Related products Valken Regulator BonnetHPA, Tanks £12.00 Add to basket Gorilla Mechanical MTW BoardEngines, FCU's & Trigger Boards, HPA £29.00 Add to basket PolarStar Gearbox Shim Set for Cylinder Conversion Kits – 0.152″Engines, FCU's & Trigger Boards, Gearbox, HPA, Parts £10.00 Add to basket Gorilla Mini FCUEngines, FCU's & Trigger Boards, HPA £129.00 Add to basket