SBF-BP by GavinFuzzyCustoms (PRE-ORDER)The SBF BP by GavinFuzzyCustoms. SBF BP stands for: SPAMF But Flywheel Bullpup. 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 BP is GavinFuzzy's remix of his own SBF, but he made it a bullpup. This blaster uses all the same hardware as the original SBF, but has a few extended cables to make things fit where they need to go. As it is