Todays Chrony Chronograph test was done on my Umarex Magnum Research Desert Eagle Blowback CO2 .177 caliber pellet pistol. The factory rating was stated as being a respectable 425 fps which is pretty good for a blowback pellet shooter. The Umarex Desert Eagle is a crisp and accurate shooter that likes to eat up CO2 cartridges, so the factory claims are believable! Read full article here: https://www.replicaairguns.com/2011/4/15/umarex-magnum-research-desert-eagle-blowback-co2-pellet-pist.html