30-30 WIN Brass Red Laser Boresight. Caliber-specific brass bore sight designed for 30-30 Win barrels, crafted from premium solid brass for stable barrel fit. It features a 635-655nm visible red laser with safe power under 5mW, offering clear aiming dot within 20–75 yards, 1.5-inch dot at 100 yards for easy optic alignment. Lightweight 43g brass cartridge design inserts easily into barrels, allowing fast pre-zero calibration to save ammunition for hunting and range training.