I've always thought that carapace armour is the equivalent of SWAT or some similar "breach and clear" team, and while you might always have access to carapace you shouldn't have that leap up from "naked defence" to "absolute turtle".
If the other armours are available, you could have "patrol", "riot" and "raid" weapons and equipment.
Juves have access to "patrol" level weapons and equipment (flak, stub gun, knife etc), representing that they may only be trusted with that level of equipment and level of activity, standard enforcers and dog handlers have access to "riot" (mesh, shield, shock maul etc) and "patrol", gunners and leaders have access to all levels (raid being carapace armour, and other stuff).
Getting access granted at various levels may either encourage or discourage different loadouts, but it also means that you're not getting bogged down fitting your handful of guys out with super expensive equipment from the get-go
IMO carapace armour like a 2000AD Judge is kinda the hallmark of the enforcers. I suppose mesh could be a lighter option. I like the idea that these are well equipped riot cops though. They're not your average PCSO knocking on your door because you mis-gendered your neighbour on Twitter.
How determined are you to sticking with it being pure enforcers? Because an alternative to having rookies/juves would be to have local deputies/watchmen.
Very. I'd like them to be sufficiently different to a normal gang. Closer to Spyrers than to a house gang. A few more bodies than Spyrers but not quite as crazy. These cops should be scary like Judge Dredd.