JJ Sport features an Airtac-based HPA build utilizing a G&G SRL M4 lower receiver. The internal configuration is centered around a Polarstar Fusion engine equipped with a purple poppet, purple nozzle, and a lightning banjo. Power is supplied by an Airtac 7.4v battery, while an Airtac regulator manages the air system.

JJ Moore Airsportz shows a step-by-step assembly of an HPA airsoft build using a G&G base and a collection of Airtac components. The process begins with internal modifications to the Fusion engine, including the installation of a purple poppet, a new nozzle, and a lightning trigger. While the mechanical surgery is delicate, the use of time-lapse helps ensure the viewer doesn't age significantly while watching the pins and springs get into position.