GoZier Tactical 223 Laser Bore Sight Red Dot in-Chamber Cartridge  .223 REM / 5.56 Red Dot Laser Sighter NOW INCLUDES 2 SETS of BATTERIES - Sighting in a scope with our laser bore sighter is easy and efficient with our 223 laser bore sight. Just place the bore sight in the chamber and adjust your cross hairs. CALIBER SPECIFIC- This 223 laser bore sight kit is designed to work for both the novice and professional alike. Will work with both the 223 and 5.56 chambers. HIGH QUALITY BRASS - Machined brass using the highest quality manufacturing techniques. Guaranteed to fit perfectly in your chamber. Re-sealable packaging to keep your bore sight safe when not in use. FAST ZEROING, SIGHTING - Designed for fast gun zeroing and sighting - Sighting range 15 to 100 yards  Recommended laser bore sight distance is 25 yards indoors. Includes 6 laser bore sight batteries. Laser will display a 2 dot at 100 yards. SAVE TIME AND AMMUNITION LIFETIME WARRANTY  Backed By GoZier Tactical LIFETIME Warranty