The Laser Ammo 223 to AR15 Adapter Kit converts the standard Laser Ammo SureStrike 9mm cartridge laser trainer into a cartridge of appropriate size for use in any firearm chambered in .223 Remington/NATO 5.56. Note: This product is designed for use with 9mm cartridges made of stainless steel and manufactured after January 1st, 2013.SureStrike 223 Adapter Kit includes:223 Dry Fire Action Cap for AR15 Barrel AdapterBattery PackUser guide