US HB4242

Exempts less-than-lethal projectile devices and their ammunition from the federal firearms and ammunition excise tax under Section 4181 of the Internal Revenue Code

Defines qualifying devices as those that cannot fire projectiles exceeding 500 feet per second, are not designed to cause death or serious bodily injury, and cannot accept standard firearm ammunition or feeding devices

Exempts qualifying less-than-lethal projectile devices from regulation under the National Firearms Act by amending Section 5845(a)

Requires the Treasury Secretary to make classification determinations within 90 days of manufacturer requests and maintain publicly available lists of qualifying devices, updated annually

Mandates annual written reports to the House Ways and Means Committee and Senate Finance Committee on device classifications, including devices considered but excluded from the lists