Hi Kyle and welcome. No, Aguila Mini Shell 12 Gauge Slugs are not rifled. Picture here (just scroll down): https://news.sportsmans.com/product-review/aguila-mini-shells

they are not rifled. Tests show that rifling on slugs do not enhance accuracy. slugs stabilize because the back weighs less that the front like throwing a rock in a sock

No, even though it states they are on Bud's listing, that is incorrect.
The link below to Aguilas site does have a video showing the slug is smooth.
aguilaammo.com/products/12-gauge-minishell-slug