Feyachi Bore Sighting Laser 223 5.56mm/9mm/7.62x39mm Switch Red Dot Laser Boresighter with Tail

Not only that, but this is a much needed upgrade with the push button on the back to save battery life and not deal with the hassle of taking out the batteries all the time to zero in different optics. It's NEVER going to be an absolute perfect zero, but it will help you get really close to make those final fine tune adjustments to get that optimal zero with real brass. If you have a range finder, it's great to find whatever zero you want and use the boresight laser at night since it's MUCH easier to see in darker areas. Great product for such a low price! Will save you a good chunk of money on ammo to help hone in on your zero. Highly recommend!GREAT TIP: Some of these boresighters come in with an unfortunate "canted" laser point. So if you want to see how accurate yours is, take an electric drill and very softly put your boresighter in it and spin the laser to see how wobbly it is. If it's too wobbly or not straight enough, let the manufacturer know and they'll likely send you another one that should be at least much better. All products will never always be perfect.

Works great, put in chamber & align with scope, couldn't be easier !

Not 100% accurate on alignment, and I don't expect it to be. Rather than starting off somewhere extremely off, this gets you closer to where you need to be so you spend less time adjusting and more time having fun. Battery life is terrible. The sight on the dot is clear and can easily be installed by single loading it. It fits into the chamber nicely. Functionality isn't the best but it's better than nothing I guess.

This is an improvement over the last two bore-sighters that I had ordered & received, over time. But, three issues need to be mentioned: #1) Bore-Sighters are meant to put the bullet on paper, saving the numbers of expended rounds off-paper; that is their primary function ( I don't know, yet, if this bore-sighter does that); #2) It would be appropriate if Instructions would indicate how many of the sets of batteries the device actually uses to function; #3) The Chinese apparently do not understand correct "+" vs. "-" battery polarity (2nd such issue I've run into, over time); the engraved polarity on the device is backwards!

I gave this 5 stars, but it turns out one of the 3 included batteries only lasted a few minutes. Otherwise it is a fine product.

This fits in the chamber without movement, so it holds its accuracy . Easy to see down range, and gives and excellent starting point to zero sights.

I had high hopes for this as I recently purchased a few new 9mm’s. My first impression was it looked great and has the on off switch I was looking for. Once I put it inside the chamber, it fit loosely 🫤. There’s no way this can be accurate if it fits loosely in a handgun. If you turn the gun upside down or sideways you can hear it rattle around. If you have a red dot, I use the circle with dot on my 507k, the laser moves from one side of the circle to the other at a really short distance. I hope it’s just this one that I received but I can’t honestly imagine that there would be much variances in the size from one to the next with this brand. Very disappointed with this product.

Worth it.