Buy Rifle Boresights for Different Rifle Calibers by Sightmark – Sightmark.com
Amazon.com : GOTICAL Tactical Red Laser Bore Sight Cal .40 Brass Boresighter Cartridge Red Dot (Will Work with Smith and WES'S) (Cal .40 Brass Boresighter) : Sports & Outdoors
Cartridge Laser Bore Sighter - OutdoorSportsUSA
Amazon.com : .30-06 /25-06 /270 Bore Sight Laser Red Dot Cartridge Laser bore Sighter with 2 Sets of Batteries : Sports & Outdoors