Product DescriptionThe Aimshot BS9MM is a cartridge-style laser boresight module built specifically for 9mm Luger chambers. Machined from brass for durability and proper chamber fit, it projects a 650 nm red laser to help you quickly align sights and optics without firing a shot. As part of Aimshot's modular boresight system, this 9mm version requires no arbor. It is powered by three LR41 button-cell batteries and offers approximately 10 minutes of runtime. Note: some semi?'auto pistols with stiff extractor springs may not function well with the laser inserted in the chamber.Product HighlightsCartridge-style 9mm Luger laser boresight for fast, easy zeroingDurable brass construction for reliable chambering and long service lifeBright 650 nm red laser provides a clear point-of-aim referencePowers with three LR41 button cells; about 10 minutes of runtimePart of Aimshot's modular system-no arbor needed for 9mmSpecsProduct Type: Laser boresight moduleCaliber: 9mm LugerConstruction/Material: BrassLaser Wavelength: 650 nm (red)Power Source: (3) LR41 button-cell batteriesApproximate Runtime: 10 minutesMount/Style: Cartridge, chamber-insertBrand: AimshotMPN: BS9MMUPC: 669256000099Disclaimer: 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.