Product DescriptionZero faster and save ammunition with the Aim Sports cartridge-style laser bore sight for .243 Winchester, .308 Winchester, and 7mm-08 Remington. Precision-machined in brass to mimic a live round, this chamber-mounted tool projects a bright 5 mW red laser to align optics and iron sights quickly and consistently. Compact and easy to use, it runs on an LR41 battery and delivers reliable performance with a 635-655 nm wavelength.Product HighlightsChamber-mounted brass cartridge boresighter for .243 Win, .308 Win, and 7mm-08 RemBright 5 mW red laser for fast, precise zeroing and sight alignmentReliable 635-655 nm wavelength for clear point-of-aimPowered by a common LR41 battery; compact and range-bag friendlyDurable brass construction; simple insert-and-align operationSpecsCompatibility: .243 Winchester / .308 Winchester / 7mm-08 RemingtonLaser Output: 5 mW (Red)Wavelength: 635-655 nmBattery Type: LR41Material: BrassMount Type: ChamberStyle: CartridgeWeight: 2.2 ozModel: Laser Bore SightType: Laser BoresighterUPC: 815879011466Manufacturer Part Number: PJBS308Brand: Aim SportsDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.