The Walther P99 is a semi-automatic pistol developed by the German company Carl Walther GmbH Sportwaffen of Ulm for law enforcement, security forces and the civilian shooting market as a replacement for the Walther P5 and the P88.
Airsoft is primarily a recreational activity with replica firearms that shoot plastic BBs that are often used for personal collection, gaming (similar to paintball), or professional training purposes (military simulations, a.k.a. MilSim, and police training exercises).
A modern combat sport in which participants eliminate their opponents by hitting them with spherical non-metallic pellets launched from a compressed-air gun
Airsoft refers to a class of replica air powered guns that originated from Japan (although the origins go back to the US in the 70s). The power levels are way below those of traditional airguns, but the guns are 1:1 scale copies of original pistols, rather than original designs.
Gats
I recently acquired one of my holy grails, a Mateba Model 6 Unica, pictured here with the "venti" sized 8-inch barrel, along with my carry piece, a Walther P99 named "The Closing Argument"