BOOLIT EYE
BOOLIT EYE Special Laser Boresighter End Barrel Laser Bore Sight Accurately and Easy to Fit Revolvers Pistols Rifle and Air Guns (.22LR/.223REM)
Bushnell
Bushnell Professional Bore Sight Kit with Case, Black
SiteLite
SiteLite Ultra Mag Green Laser Professional Boresighter
MidTen
MidTen Bore Sight Cal Red Dot Boresighter 223 5.56mm Rem Gauge with Two Sets of Batteries
MidTen
MidTen .243 308 Bore Sight Laser Red Dot Boresighters 308 with Batteries
xaegistac
Xaegistac Rifle Scope Boresighter Kit-Precision Firearm Bore Sighter Kit with Arbors
MidTen
MidTen Magnetic Bore Sight, Green Laser Bore Sight Kit Multiple Caliber, Professional Laser Bore Sighter Rifling Scratch Proof, Suitable for Sighting Scopes Hunting Magnetic Connection
MidTen
MidTen Laser Bore Sight for .22LR/.223REM/5.56MM Cal, End Barrel Laser Bore Sight, Red Laser Boresighter with 4 Sets of Batteries and Spare O-Rings
BOOLIT EYE
BOOLIT EYE Laser Bore Sight 12GA Laser Boresighter Comes with Switch and Large Capacity Battery
How Do You Choose a Boresighter?
Any seasoned hunter should have a boresighter, as it provides an accurate reference point for the shooter and saves ammunition expenses and time. With a boresighter, a shooter will still have to adjust for altitude and wind speed and direction, but it will definitely help in getting closer to the target. There are quite a few models in the market, but you must do some research to find the best boresighter to improve your shooting technique. Here are a few pointers to help you make the best purchase!
There are two types of boresighters in the market: mechanical and laser. Mechanical boresighters are quite basic and use a number of arbors, specifically sized for each caliber. After selecting the proper arbor and inserting it in the muzzle, the boresighter will be attached and aligned to the arbor. A laser boresighter will project a dot on the target and align your sight with the dot and the bore of the gun.
What to Consider When Buying a Boresighter
Ensure durability: Inexpensive laser boresighters cannot survive rough use for a long time. As this is a one-time investment, it is better to buy from a reputed brand so that it lasts at least a decade.
Think about the caliber: Laser boresighters need to match the caliber of your gun. For a magnetic boresighter, you need not think about matching the caliber.
Determine your purpose: There are two kinds of laser boresighters. The first one is fitted in a gun’s cylinder or chamber and is perfect for a distance between 15 and 100 yards. This one can be used for all barrel lengths. The second one will need a barrel length of minimum four inches and can be used at a distance between 10 to 100 yards.
Consider your budget: Before you buy any model, you should also fix a budget and look for a boresighter with proper technical specifications within that range.
Source: http://www.opticsplanet.com/howto/how-to-choose-and-use-a-boresight.html
http://www.cabelas.com/product/Laser-Boresight-Buyers-Guide/532748.uts
https://stayhunting.com/best-laser-bore-sight/
http://www.outdoorbasecamp.com/hunting/how-to-choose-a-boresighter/