I originally reviewed my first generation Umarex PX4 Storm CO2 Blowback Pellet Pistol back in August of 2010. Mine was actually one of the first PX4's to come into Canada. Since it has been almost 4 years since I first got my hands on this pellet pistol, I though it might be worth taking a revisit of it and comparing a first generation version to a current generation version of the Umarex PX4. Cosmetically they are really close, I found it hard to tell them apart visually, My first generation had perhaps a slightly lighter colored slide? Other than that they look identical. When I loaded them both up with pellets I did notice that my 4 year old PX4 magazine was tighter in terms of loading the pellets, So in other words, the new Umarex PX4 magazine has slightly larger diameter holes. I don't think this really made much of a difference while shooting, it's just a bit easier to load the newer magazines. Read full article here: https://www.replicaairguns.com/2014/6/24/umarex-beretta-px4-storm-blowback-pellet-pistol-first-gen-ve.html Buy PX4 Storm in Canada: http://www.replicaairguns.ca/beretta-px4-storm-blowback-bb-pistol.html