Golo Airsoft provides a technical guide on customizing the VFC MP7 Gas Blowback Rifle to optimize its performance and durability, particularly when using CO2 magazines. He details essential internal modifications, such as installing a custom 3D-printed shock absorber and a stronger return spring to prevent the chassis from cracking under the heavy recoil of CO2.

A major focus of the tutorial is modifying the CO2 magazine to fix a "bottleneck" issue where the gas intake pin is too narrow. By enlarging this opening to 2mm, the Golo Airsoft demonstrates that the rifle can maintain a more consistent rate of fire and better vaporization during full-auto use, which otherwise suffers from significant performance drops.

The guide also covers various fine-tuning techniques, including reversing the flow valve for better stability and reinforcing the bolt stop with stainless steel to prevent wear on the soft zinc alloy parts. Through side-by-side testing, he shows how these custom adjustments lead to a more reliable and winter-ready airsoft gun.