Smashing drive sir!
And remember, that's a third of the relatively insignificant quantity of guns reported, vs. actually warehoused, and that assumes what is in official inventory reflects 100% of what has been seized. Any bets that it's even close?
Which is probably a good thing, because if it takes 100 newly-assigned "Project Gunrunner" ATF agents "(and those are in addition to the organization already in place!) to help unclog the 700-weapon backlog," imagine what a boondoggle it would be if you dropped 300,000+ serial numbers into their trough. Especially since, based on "time to crime," it looks like most of them are 14 years old!
Go read the whole thing.