There is an adjustable tension bow, with a strength slider, maybe that's what you were thinking about? Otherwise I don't see why easy breakdown wouldn't work. Two complex actions to snap in the arms and hook the string, and she's gtg
If you're going for concealability, remember a quiver can be almost as tricky to hide.
I actually really like the easy breakdown mod. The description mentions the disassembled weapon components fitting into about the area of a briefcase.
Why not buy a briefcase?
100¥ for a "nice" briefcase, 500¥ for "good",
Add a biometric lock for good measure,
GM might be iffy on the quickdraw quiver,
But you can probably fit a regular quiver and respectable arrows along with the broken-down bow.
If it already takes two complex actions, might as well make it three to have an all-in-one case with some security and concealability. Save some money and you can probably look into more upgrades for the case, maybe MAD beaters, or that faraday coating might help if your bow has a smartlink, dunno, would need to doublecheck detection rules and coatings, but you get the drift