"TMAWHs all have the same layout. When creating a new Burbclave, TMAWH Development Corporation will chop down any mountain ranges and divert the course of any mighty rivers that threaten to interrupt this street plan -- ergonomically designed to encourage driving safety. A Deliverator can go into a Mews at Windsor Heights anywhere from Fairbanks to Yaroslavl to the Shenzhen special economic zone and find his way around."

Sure you do. If an agency has tens of thousands of agents with multiple yearly training/qualification exercises, then the amount of ammo they might need can be quite high. Especially if it's on the order of 100+ rounds per agent per qualification per year. Throw in duty ammunition, and the amount of ammo needed goes up; their handguns alone would use 12 rounds per magazine, and each extra magazine is another 12 rounds. If they're using a submachine gun (Wikipedia suggests they use the UMP .40), then that's 30 rounds, plus another 30 for each duty magazine. I have my doubts as to them actually *needing* that much ammo for what they actually do in their agency role, but over a five year period, it's not necessarily that insane an amount.

Most "silencers" are actually suppressors; that is, they suppress the noise the gun makes from powder detonation down to lower decibel levels, but they more or less don't make it whisper quiet/silent. Valid reasons to have them would be to prevent hearing damage in general, in addition to noise control for places such as shooting ranges that might be near other developments (say, an indoor range, or an outdoor one that has had residential and commercial development encroach upon it). Even countries with stronger gun control than the US (Finland and England, for example) encourage shooters to own and use suppressors for the above reasons. From a health and public nuisance standpoint, it's actually a better question to ask why they're so restricted in the first place; the noise of an unsuppressed gun doesn't really deter criminals from misusing them.