Forty-four states have constitutional guarantees on the right to keep and bear arms. To read 43 of them see Dowlut, Robert, "Federal and State Constitutional Guarantees to Arms", 15 U. Dayton L. Rev. 1-89(1989). (Scroll down to the Appendix.)
Wisconsin was the forty-fourth state (November 1998) to add a constitutional provision, it reads:The people have the right to keep and bear arms for security, defense, hunting, recreation, or any other lawful purpose. (Art. 1, § 25)Since 1970, fifteen "states enacted their own state constitutional rights to keep and bear arms for the first time, or strengthened their existing rights". ( The Second Amendment as Teaching Tool in Constitutional Law Classes)
Professor Eugene Volokh, of UCLA Law School, has assembled state constitutional right to keep and bear arms provisions, by date (from 1776).