9MM/ .243 .308/6.5MM/300BLK 7.62x35mm/.44mag/30-06/25-06/270 Cal Rem Gauge Bore Sight Red Dot Boresighter with Batteries

Using this in a Beretta 92FS. I found a video somewhere that shows how to check the calibration of this sighting laser:1. Get two identical, cylinders (like wood dowels, ink pens, crayons, etc.) to use as your calibration base.2. Place them side by side on a flat level surface.3. Hold them together and place the laser bullet on top of them, in the middle, so that it's resting in between them.4. With the laser dot trained on a wall, rotate the bullet whicle holding your two base cylinders together.5. Watch the red dot. it should look unmoved, though it may change shape slightly, as the laster dot is not a perfect circle.Anyway, I did this so I could tell that the dot was perfectly centered in the bullet. Now I know where my shot should hit my taget, based on how I line up the sights.

This bore sight works amazingly well. I used it to zero my red dot sight on a 9mm pistol, and it made the whole process fast and precise. The laser is bright and easy to see even in decent lighting, and having three sets of batteries included is a great bonus—no need to worry about it dying halfway through setup.It fits snug in the barrel and doesn’t wobble, so alignment stays consistent. For the price, the quality is impressive. If you’re looking to save time and ammo when zeroing in optics, this is a must-have in your range bag. Highly recommend!

Great item. Will zero your red dot perfectly. The light the beam ejects is bright enough to catch your dot for adjustment. Feeds into barrel and ejects without an issue

Works great but I would love to see a little twist on off switch at the front or back. I’ve already lost the batteries lol.

This works well and saves money.

A good laser bore sight is going to be perfectly centered in your barrel to have your red dot zeroed correctly. Unfortunately, many laser bore sights are not perfectly centered. To determine if yours is, roll it on a flat and even surface, ensuring the laser points against a wall. If the laser goes up and down instead of a straight line as the laser bore sight is rolling, then it is not centered correctly. I am happy to say that out of all the laser bore sights that I have tried, this one rolled in a perfectly straight line.

Great build quality helps with alignment & adjustment with accuracy with sight & bore sight is bright like a Lazer light.

Don't buy this crap. It comes with 6 watch batteries. It holds 3 but then you cant close the bottom. It won't screw close unless you take a battery out. The laser lights up the moment you touch the 3 battery. This device is a joke. And the laser don't show good in daytime. So please don't buy it.