Laser Ammo Digital Boresight Conversion Back Cap for SureStrike .223 AR-15

Used 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 .223 Digital Bore Sight (DB) Back cap converts the .223 SureStrike for the AR-15 into a digitally controlled bore sight activated by trigger pull, featuring convenient and efficient battery use. Pull the trigger to dry fire and you get a constant on laser. Turn the laser off by dry firing again.The .223 Digital Bore Sight (DB) Back cap can only be used to replace the cap on the .223 SureStrike for the AR-15.Patent Number: 8,707,868,707,867 B2, 8,734,156