HjK World showcases his custom, high-end electric gun build, demonstrating his expertise and attention to detail. The build incorporates advanced components, including a new type of electronic trigger from Hakusyo Shoten, the Kakuro 2 G1, which uses a magnetic sensor. Other key features include a Sparker from H Craft, a brushless motor, and a custom receiver from F1 Firearms. The internal customization aims to achieve a balance between power and efficiency, using a DSG (Dual Sector Gear) setup with a lighter piston and a weaker spring.

The video also addresses the challenges he encountered during the build and their solutions, such as resolving air seal issues and achieving consistent muzzle velocity. He discusses the advanced features of the Kakuro 2 G1 electronic trigger, including its adjustable trigger sensitivity and a unique "silent" firing mode. The video concludes with a demonstration of the gun's performance and a call to action for viewers to subscribe for more content.