Its a 12 gauge semi-auto version of the shockwave, with a 5-round tubular magazine.
Yes, it is legal in CT. It is an “other” but allowed because is a manually operated pump-action
The 990 Aftershock is not a pump action it’s a semi auto.
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You are correct, I read the title Mossberg 590 Aftershock CT legal? And it is legal in CT. I think what happened is the 590 is a Shockwave and the 990 is the Aftershock, and the names got mixed up…