Achieve a clear view of game far off in the distance by mounting the SSI Site-Rite .22 LR Chamber Cartridge Laser Boresighter on your firearm. Designed for .22 LR caliber firearms, this laser boresighter features a red-dot reticle for visibility during dark early-morning or late-night hunts. External on/off switch for easy operation. 30-yard sight range. 3.5" dot size at 100 yards.