Every once in a while something goes wrong and your favorite BB shooter stops working as it should :( One of the most common problems I see with many of the full blowback BB and Airsoft pistols are BB's getting stuck in the gas tube. This is because this style of gun loads a BB into the breach area of the barrel every time you rack the slide forward. Of course this is only when there are BB's in the magazine. Read full article here: https://www.replicaairguns.com/2013/5/10/cybergun-kwc-tanfoglio-witness-1911-stuck-bb-removal-tutoria.html