Premium Quality, Cal .410 Red Dot Laser Bore Sight Cartridge, Boresighter, Made of Brass (New Version)

Very good bore sight tool. Easy to use. Came with the batteries. Very bright laser. Highly recommend

Good quality, great product.

PUT BATTERIES IN AS EXPLAINED IN INSTRUCTIONS, PUT IN GUN BARREL, THIS WENT IN SLICK AS COULD BE PERFECT FIT AT THE RECIEVER END, VERY CAREFULLY AS TO NOT SLAM IT INTO LASER. ADJUSTED THE SITE PER THE LASER SIGHTER AND WAS DEAD ON THE MONEY!! HIGHLY RECOMMEND IF YOUR NOT LOOKING TO SPEND HUNDREDS OF DOLLARS BUT LOOKING FOR A GOOD LASER SITER THIS IS IT!

1) This Bore Sight appears to be well made, and of heavy brass construction.2) Included instructions states how to install the 4 small, button batteries but the Bore Sight came with them already installed and required removing them as well as a piece of plastic that prevented accidental power-on... which requires reinstalling the batteries that depending on how well your dexterity is, may involve some light cursing. Anyway, upon installation of the Batts, the unit does power on.3) The Red Laser does seem bright but if I follow the printed instructions on how to turn off the Laser ( by partially unscrewing the End Cap), the Laser does NOT turn off until the end cap is completely unscrewed.That's probably okay for long term storage, but it is not what's stated in the instructions ( with specifically states to " twist the cap until the Laser goes out ( on my unit, again that never happens until the end cap is removed.4) successful application using this device to sight my shotgun is still to be determined later and this review and rating will be updated then if needed.5) this unit was the only option on amazon for 410 Guage shotguns, and at $20, whether or not this Bore Sight is a good value will be also determined later after it is put to the test..On a more positive note, the shipping from the Vendor outside Amazon was fairly fast!

In order to workaround the poor battery-circuit connection I placed a very small chunk of 0000 steel wool between the batteries and the screw-on cap. That fixed the problem. This bore sight cartridge worked great on my KelTec KSG410. Once finished I emptied the batteries and steel wool back into the little ziploc they arrived in until next time I need this.

With the batteries installed already THEY need to let you know about the little piece of plastic insulator inside the laser .

Tight fit in the chamber and works well. Just don't jam it too far into the chamber.

It works