Fully Charged Airsoft goes through the process of upgrading a Tokyo Marui 5.1 Hi-Capa airsoft pistol. He performs basic modifications, such as carefully replacing the spring to ensure a "super smooth" operation without drag, noting that this is the first stage of the custom build. After the assembly, the video transitions to testing the new pistol in an airsoft CQB (Close Quarters Battle) environment.

Fully Charged Airsoft does an unboxing of the EMG Daniel Defense MK18 & M4A1 SOPMOD Block II made by CYMA. The Special Operations Peculiar MODification (SOPMOD) Block II, an accessory system for the M4A1 carbine, features a full-length monolithic rail system and a heavier free-floating "SOCOM" profiled barrel for improved accuracy and heat mitigation.