Jaeger Precision demonstrates how to upgrade the external components of a Welpro W06 PPK20 gas blowback airsoft gun using inexpensive 3D-printed parts. He shows the process of replacing the original handguard with a more ergonomic, "futuristic" one that has M-LOK slots, as well as installing a new grip adapter that allows for a more comfortable, standard airsoft grip. These modifications are said to significantly improve both the aesthetics and handling of the airsoft rifle.