Bayattoo Bore Sight 9mm/.40 S&W/45ACP/223REM Laser Sight Red Dot Boresighter with 9pcs Batteries

Bright and visible red laser ,batteries easy to install perfectly fits my canik and fnx,and good price for two bore sights

I had great communication with the seller and the product works well. I had an issue with the batteries, but the seller provided replacement batteries. The seller was easy to communicate with and went out of their way to make it right. I would definitely buy from them again.

The Bore Sight seems well made. 4 Stars, I don't know how durable they will be. The instructions were to the point. The design is put the batteries in screw on the cap, Its on. No switches buttons or guides for different calibers. I picked up the 9mm and 45acp set. It has helped me identify with one red dot how far off zero it was. I will evaluate further at the range to see what distance the laser will reach. It is a helpful tool for Bore Sighting. Provided is a storage tin with foam padding. Included in the case were extra batteries. Removal of the batteries when not being used turns off the laser. Another perspective, you can diagnose Iron sights seeing how they may be zeroed or not.

These all work as expected. I used the .40 S&W laser cartridge to boresight a red dot sight on a 10MM Auto pistol. It worked fine and the impact was close on the target at the range requiring minor adjustment. As with any laser, especially red lasers the beam does not work well in bright sunlight but inside or overcast outside it is bright enough.

Laser boresight works great. Easy battery installation. When you put the laser in the breech/barrel, recommend that you cover the barrel muzzle with black duct tape so that you can see that the boresight laser is centered in your barrel without doing damage to your eyes. Then you can remove the tape to sight in your scope/red dot/laser with barrel laser for distance/point of impact based on trajectory.

They work, but not very bright.I can use them indoors in a very limited range to check general accuracy (at very short distances <10m) The beam diffuses too quickly to be very useful after that.

These are very cost effective. They have shown me that my iron sights were off enough to completely miss the target.

The laser beam is not true by a right side offset as compared to other lasers of the same type. Additionally, when placing the batteries in the .40 cal laser, the laser beam came on bright, however when adding the 3rd battery and and screwing the back on, the laser's beam was barely on. The same thing happened with several of the "new" batteries. DO NOT PURCHASE!