Hey everybody. I have a King Arms M4 and i am having feeding problems. The bbs are getting stuck in front of the bucking in the hop unit. I am positive that the bucking was installed correctly. It happened with multiple hop up units, multiple barrels and multiple buckings. My only ideas that the nozzle may be too small, which doesn't make sense to me because it is stock King Arms. Or that something isn't letting the tappet plate move far enough forward. I am very confused. Any advice would be nice.