Still wanting more photos of the Crawler Barrel from MadBull Airsoft? Simon Lee obliges.... "More photos of MadBull Crawler barrel. The Madbull Crawler Barrel A low cost solution for velocity adjustment. Efficiently reduce your AEG's velocity from 30 to 100 ft per sec (depending on your AEG's condition). You can find out how we did on the Crawler barrel to reduce the BB velocity and still keep accuracy."
Just click on the image below to learn more: