Adds new GS Chapter 14, Article 53D (Regulation of Large-Capacity Ammunition Magazines). Defines “large-capacity magazine” to include (1) a fixed or detachable magazine box, drum, feed strip, or similar device capable of accepting, or that is designed to be readily converted to accept, more than 10 rounds of ammunition, (2) a fixed or detachable magazine that is capable of accepting more than eight shotgun shells, and (3) a detachable magazine, tube, box, drum, feed strip, or similar device that is capable of accepting more than eight shotgun shells when combined with a fixed magazine. Excludes from the term: (1) a feeding device that has been permanently altered so that it cannot accommodate more than 10 rounds of ammunition, (2) an attached tubular device designed to accept and capable of operating only with .22 caliber rimfire ammunition, or (3) a tubular magazine that is contained in a lever-action firearm. Prohibits possessing, manufacturing, selling, purchasing, or transferring a large-capacity magazine, and makes the violation of this prohibition a Class 2 misdemeanor offense with subsequent offenses a Class 1 misdemeanor; violations committed during the commission of a felony are a Class I felony.

Provides exceptions to the prohibition for entities and employees manufacturing large-capacity magazines for federal, state, or local government entities, licensed firearms dealers selling out-of-state, and foreign governments approved for sales by the federal government. Also excepts persons carrying large-capacity magazines in the course of employment as a military or government employee. Allows persons who possess a large-capacity magazine to modify, surrender, or sell to a licensed firearm dealer for out-of-state use within 180 days of the effective date of the act.

Effective and applicable to offenses on or after December 1, 2025.