Hey, join our
Discord since we're more active over there than on the forums these days.
You can find a few AT mine kits dotted around (I think Windmill has one) but I
think that they aren't in the spawn menu in lieu of the geballte which some people (including me) prefer and find more effective.
Cobra will be getting an update in the next patch tho, and we're hoping those changes balance things out a bit more.