LongRanger  

Same reason they never made a B2 - when they went to the 3rd iteration of the 206 and 206L, they decided the model number should match the iteration.  B3 was the 3rd Jetbox, L3 was the 3rd Longbox.  They obviously realized how confusing it is (god knows I’ve heard a lot of people go on and on about what they think a B2 Jetbox is) and started doing random and nonsensical letter suffixes for subsequent iterations of machines (SP, HP, EP, EPI, EPX, GX, GXP, GXI, etc).