Type: BB machine gun. Manufacturer: ZMZ. Model: Tyrex PPA-K-01. Materials: Steel. Weight: 3.24 pounds. Barrel: 4.83 inches, metal non-rifled. Propulsion: 12 gram CO2. Action: Semi & full auto, single action. Ammunition Type: 4.5mm steel BB. Ammunition Capacity: 25 round magazine. FPS: 328-394 fps. I have been wanting to get my hands on the ZMZ Tyrex PPA-K-01 BB machine gun for some time now and I was willing to pay dearly for it! I am very happy with this purchase not just as a collector piece but one that I plan to take out and shoot often. Here in Canada the real version of this gun is completely unobtainable so this will have to do and even better yet I can shoot it in my backyard! The Tyrex PPA-K-01 is very pleasing to shoot and sounds more like a suppressed real gun then a BB gun adding to the enjoyment of shooting the Tyrex. Perhaps one day I'll swap the rear sight around and really see how well this BB gun shots? Read full article here: https://www.replicaairguns.com/2011/11/17/zmz-tyrex-ppa-k-01-45mm-bb-machine-gun-review.html