Kakasi Tactical tested the Umarex/GHK HK416A5 airsoft rifle at an outdoor range, operating the gas blowback system in both semi-automatic and full-automatic modes. The demonstration included firing from standing, kneeling, and prone positions to evaluate the rifle's recoil and cycle rate. Throughout the session, the user practiced magazine changes and reloads while keeping the rifle oriented toward the target.

The rifle used in the video features a Cerakote finish and is outfitted with an electronic sight and a flashlight. The only internal modification made was the installation of a stiffer buffer spring to adjust the cycling action. During the initial testing period, the platform functioned consistently without mechanical failures or performance issues.