Www.gocra.org - Group that brought shall-issue Permit to Carry to MN, among many other pro gun laws. And stopped numerous Bloomberg bills despite anti-gun majorites in both chambers of the legislature and the Governor.
Www.mngopac.org - PAC getting pro 2A people in office and keeping anti 2A people out.
There's a group out of Iowa that pretends to be a MN or to fundraise, but they don't do anything productive in the legislature.
Hope that helps.