Fine-tune your aim with confidence using the .223 Rem 20X Laser Boresighter-a compact high-performance tool built for speed accuracy and convenience.Engineered in a sleek cartridge-style design and crafted from durable brass this chamber-mounted boresighter delivers seamless integration into your firearm for reliable and repeatable sighting every time.Tailored specifically for .223 Rem caliber firearms this versatile boresighter also accommodates a wide range of additional calibers through the use of optional AimShot arbors-no arbor needed for 9mm.Its 20X brighter red laser diode ensures superior visibility even in full daylight or at longer distances making it the ideal choice for both indoor and outdoor environments.Powered by a single L736 battery the laser delivers consistent output for precision adjustments helping you reduce wasted ammunition and minimize range time during zeroing.Whether you're gearing up for the range prepping for a hunt or maintaining optic accuracy after transport this compact boresighter is a must-have for any shooter seeking effortless alignment and dependable performance.Features / SpecsCaliber: .223 Rem (compatible with other calibers via optional arbors)Laser Output: 20X brighter red laser for enhanced visibilityDesign: Cartridge-style chamber-mounted for easy setupMaterial: Precision-machined brass for durabilityBattery Type: L736 (included)Compatibility: Works with rifles and pistols; arbors available for most calibers except 9mmUse Case:Ideal for huntersCompetitive shootersFirearm enthusiastsBenefit:Saves time and ammoEnsures pinpoint accuracy