DENVER — Denver-area sheriff's offices told Denver7 they plan to comply with Colorado's newest gun law, even as some call the law unconstitutional and an unfunded mandate. Denver-area sheriffs comply with CO semi-automatic gun law despite oppositionThe Montezuma County Sheriff's Office said it will not participate in administering eligibility cards, citing funding, staffing and constitutional concerns. The Weld County Sheriff's Office said it is taking part in the mandated process despite staunch opposition from Sheriff Steve Reams. The Jefferson County Sheriff's Office said it is enforcing the law and is not considering opting out. Gilpin County Sheriff's Office said it is complying with the law for county residents.