Check the listing for details. AimShot 223 laser bore sight 20x brighter red laser. Condition: New. Listed at 35.99 USD. AimShot .223/5.56 laser bore sight module. This is the brighter red laser (632nM) version that is easier to see at longer range or in full sunlight. Designed to make it quick and easy to bore sight your rifle chambered in .223. This laser is also the basis for the AimShot laser bore sight system and is used in conjunction with the AimShot Arbors to bore sight other rifle calibers. Insert brass 223 laser module into chamber and align scope reticle to match laser beam at 20 yards. Remove laser and proceed to the range for final adjustments at whatever distance you want your zero. This bore sight is designed to save you money and get you on paper at 100 yards to do your final adjustments. This is the system that AimShot recommends be used with our arbors for any caliber laser bore sighting. It is the most versatile and accurate system on the market, and should not be compared to any other chamber based bore sights. AimShot has the original patent on the chamber laser bore sight and still makes the best system. More accurate, more durable, longer lasting and functionally superior to any other system on the market. Used extensively by manufacturers in the industry, and the US military. The original and still the best. The AimShot laser bore sight system is designed around a single high quality laser, 223 for the rifle calibers, and a system of hollow arbors that are designed to fit over the 223 laser and fit in the chamber for other calibers. So if you want to bore sight a 308, you would need this 223 laser and then the appropriate arbor (AR243 in this case will fit all 308 based calibers). Being able to bore sight additional calibers by purchasing additional arbors instead of lasers for each caliber is much more cost effective. AimShot currently offers 21 different arbors to fit the 223 laser, from 22-250 all the way to 12 gauge and 50BMG. This sale is for a single 223 laser bore sight, additional arbors available separately at additional cost.