Senate Bill No. 123 amends the Oklahoma Self-Defense Act by modifying the definition of prohibited ammunition for handguns. The bill specifies that any concealed or unconcealed handgun carried in accordance with the Act and loaded with certain types of ammunition will be considered a prohibited weapon. Specifically, it removes the previous restrictions that defined prohibited ammunition as either a restricted bullet or any ammunition larger than .45 caliber.

Additionally, the bill eliminates the administrative penalty that previously imposed a fine of $500 for violations of this section, meaning that individuals found in violation will only face criminal prosecution as outlined in existing law. The changes aim to streamline the regulations surrounding ammunition and firearms under the Oklahoma Self-Defense Act. The act is set to take effect on November 1, 2025.