I suspect you guys are either messing with him or don't understand what he's saying. Like we all discovered, the faux gas-block, whether railed or not, was never intended to be connected to the gas system and that Bushmaster only put it there to make potential customers feel better about the looks. I believe the correct vernacular is
"Tits on a Boar".
BTW, nice setup Mossy89.
Tim can explain this better as he's had to do it for many of us over time, but in a nutshell, The internal ballistics of the 450b function more effectively with a shorter gas tube system (the one hidden under the handguard).
Hoot