SBF by GavinFuzzyCustomsThe SBF by GavinFuzzyCustoms. SBF stands for: SPAMF But Flywheel. However, at this point, the naming convention is just tradition. This blaster really doesn't have much, if anything, in common with the original SPAMF itself. The SBF is GavinFuzzy's entry into the world of electronic blasters, and he really outdid himself. This blaster is Brushless, features a machined aluminum flywheel cage, machined POM flywheels and barrel, with custom PCBs that