It allows for quick and accurate resetting of all sight types (iron, optical, laser, holographic, etc.). For ultimate accuracy, this boresighter laser is adjustable according to elevation and wind force. It’s also lightweight, durable and comes with four adapters, extra batteries (six total), and tools so that you’ll have everything you need for all your weapons. <br> <br> Package Includes: <br> 1 x Padded storage box <br> 1 x Laser bore-sighter <br> 1 x Screwdriver <br> 1 x Spare screw <br> 1 x Allen wrench <br> 4 x Adapter tips <br> 6 x AG13 batteries (3 spares) <br> <br> Specifications: <br>Laser Class:IIIa <br>Max. Output Power: less than 5mW <br> Weight: 1.34oz/38g <br> Material: Aluminum <br> Length: 6.1”/155mm <br> Length of rod that fits in the barrel: 2.36”- 3.54”/60mm - 90mm (tapered) <br> Head diameter: 16mm <br> Tail diameter: 5mm <br> Laser wavelength: 635-655nm <br> Laser color: Red <br> Power: 3x AG13 batteries <br>