Bingo Airsoftworks released this video for troubleshooting such internal parts... "This video demonstrates some of the tests you should do with your hopup, bucking and barrel to troubleshoot BB feeding problems. The video shows the BB drop test, BB push through test, and how to test for air seal on the PolarStar Fusion Engine."

Another howto video courtesy of Airsoft Outlet Northwest and covers MadBull Airsoft's Blue Bucking Installation... "In this video Airsoft Outlet NW's head tech demonstrates how to install a Madbull Blue Bucking in a KWA SR7's Hop-up Unit, as well as how to modify the Hop-up adjustment dial so that it stays in place more effectively.

Mad Bull Airsoft just emailed us about their newly released products that will surely help you improve firing your bbs... "Gents, We just have 2 new styles of buckings join to the family: Regular style and Shark style. It is made by 60 degree rubber which is softer than the regular buckings." These are easy to install and require not much skills. Both of them are available now so you can check with your favourite retailers if they already have these in stock.