The Umarex Walther P99 CO2 Blowback Airsoft Pistol is a fairly low cost Airsoft BB pistol but even so, there is no reason why we should expect less than stellar performance from it. I have already done a pretest for the Umarex Walther P99 CO2 Blowback Airsoft Pistol while making my Table Top Review and it shot right around the 333 fps mark, but it was a colder day then. I also shot my Umarex Walther P99 DAO from a much closer 20 foot distance for the pretest and got a respectable 2 inch grouping. On the actual Field Test Shooting day it was much warmer (tank top weather ;) and so as would be expected, this time my Umarex Walther Airsoft P99 shot a bit quicker at right around a 356 fps average, shooting 10 rounds through my Chronograph. I would expect to get even more fps on an even hotter day as it was only about 22 degrees Celsius or about 72 Fahrenheit on this test day. Read full article here: https://www.replicaairguns.com/2013/6/6/umarex-walther-p99-co2-blowback-airsoft-pistol-field-test-sh.html