re: SDS, G-force, JTS. Are any of these "tacticool" cheap 12 gauges any good?

If you're on a budget and in the market for a tactical shotgun, there is a budget-friendly company who specializes in just that market and they have both law enforcement and military customers who are very satisfied (as well as a dizzying array of satisfied civilian customers, a robust third party accessory support and massive user base with online forums, information exchange, etc.)

Hint: It both rhymes with Mossberg and is Mossberg.