MO SB389

Lowers minimum age for concealed carry endorsement from 23 to 21 years old for Missouri residents.

Creates new section 571.099 allowing Missouri residents with valid out-of-state concealed carry permits to obtain an out-of-state concealed carry endorsement on their Missouri driver's license.

Requires applicants for concealed carry endorsements to complete firearms safety training meeting standards in section 571.111 and submit proof of completion with their application.

Concealed carry endorsements remain valid for three years and are recognized statewide; holders may carry concealed firearms except in specified locations including schools, courthouses, correctional facilities, and private properties posted with prohibition signs.

Authorizes citations and fines (up to $100 for first offense, $200 for second within six months, $500 for third within one year) for carrying concealed firearms in prohibited locations, with possible suspension or revocation of endorsement for repeated violations.