Hi all. Pretty new to air soft and going on my first skermish this Sunday. I bought a cheap k warrior 1911 auto to use, which came today. I gassed it up and fired it but it expelled all of the gas. On closer inspection it looks like the part that pushes the bb into the barrel is sticking in the barrel. I stripped it down and took all the rough crap off the slide etc.and checked for any sticking, I even smoothed the edge on the plastic pusher, I have also changed the part. It fires some shots then sticks again. The only other thing I can see it the hammer is fowling on the slide, will that cause the problem? Any suggestions before Sunday please.