[Daniel V]

So abilities that make certain groups of weapons count as a step easier look for designation on the weapons that they belong to certain groups (weapon groups, ancestry traits). Crossbows aren't actually a weapon group though, they're a subset of bows, and weren't getting the particular tag that was needed for that matching (they're marked as "crossbows" for effects, but this needs a specific tag). TLDR I've fixed them and (beast guns), so that'll go out next release.

For attaching a bayonet, if you open the details of your crossbow, go to the "Attachments" table, they'll be an option to purchase there. Alternatively if you buy one from the Weapons table, you can click the ellipsis menu on the right side of the item in the table, and in the "Move To" menu, at the very bottom should be weapons it can be added to.

Sturdy shields are all in the Armor table.

As mototom said, make sure you don't have "Show only mundane items" checked when you have the purchase windows open, that would hide both of those. Bayonets (and other attachments) aren't really standard fare, so they're designated to hide if that's checked so they don't show in the weapons table specifically, as to not overwhelm newer players.