Uses as a “Snap Cap” to protect your firing pin, the back cap is the brains of the laser cartridge and controls the pulse of the laser. The Replacement 223 for AR-15 cap is for customers that already own a SureStrikeTM 223 cartridge and need a replacement back cap. This is can not be used to convert your exsisitng cartridges into a 223 cartridge. This item includes: 223 for AR-15 Back Cap - minimum of 5,000 shots Battery User guide All replacement back caps have a microprocessor controlled primer activating the SureStrikeTM laser cartridge. By using exchangeable back caps, you can decide which functionality is most suitable for your training. This feature makes SureStrikeTM the most versatile dry fire training system available today.
