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

Works perfectly for sighting in pistols and pistol caliber rifles.

Works great only tried the 9mm so far, but im sure the other 2 work just as good. Great price for 3 different bore sights. Super easy to use and made sighting in my pistol super quick and easy.

The lasers are bright, but the 45acp foresight will not allow my XDE to fully go into battery. This causes a slight upward can't to the barrel and a resulting inaccurate laser dot down range.

Being "close" in accuracy only counts in games, not in gun-smithing. I'm particularly disappointed with the 40cal S&W. Yes, the barrel fit is fine, but you better not accidentally close the chamber. If you do you will find that its the bore-sight's extra length will make removal extremely difficult. As they say, Close, but no cigar. My addendum can be summarized in 2 words; 'Customer Service'. I have yet to recall ANY company that has come close to what this seller has done to make things right. Having read my review, they reached out to ask what they could do to mitigate the issue. They offered to send a replacement, which when it arrived appeared to have similar irregularities seemingly relating to only the S&W40. After a few additional email exchanges with photos of measurements, they concurred that looking into a particular nonconformity was a priority going forward. IN THE MEANTIME, they sent me a universal boresight as a workaround while at my end, I went forward with their suggested corrective measures for the S&W40 boresight in my possession. As I said at the outset, I have yet to encounter ANY seller with the same willingness to resolve an issue with their customer. Highly Recommended...

it's a no brainer. dropped it into the barrel for checking if it aligns with my iron sights, the 9mm was spot on, but the .40cal and .45cal lasers were off by a few degrees to the left.... no way to reset or configure the laser... no windage or elevation..... dollars down the drain....

The laser bore sight kit has worked very well. I had seen complaints about the lasers not being aligned, and I never experienced that issue. To test alignment, I placed each laser on the desk and rotated them around, holding position using a square I had clamped to the desk. They all maintained alignment, measured by the laser holding position on the ceiling. The only issue I noted was with my Holosun HE507C GR optic. While the lasers were visible through my 407C and Osight SE, it was very faint while looking through the 507C. I am not sure if there is an optic coating used on the 507C vs the others, but I had to turn down the brightness on the 507C in order to see the laser. Overall, I highly recommend this kit for anyone looking to initially sight in their pistol red dots.

I have found them to be very useful. They are not absolutely perfect BUT they are great to confirm sight adjustments before going to the shooting range and wasting expensive ammunition. Remember to remove batteries after use. These small batteries don’t have a long life and you won’t want them to corrode while in the bore sighters.

Either mine was defective, or the product design is terrible. Laser is bright, then dim, then off, then on, then off, then blinking, then solid, just acts like it doesn't enjoy life as a laser and would rather be a lazy. There is simply no way the product is useful with this issue. The manufacturer offers a warranty, but it is much easier to simply return item for refund rather than deal with warranty and maybe not get fixed or go past the Amazon refund window. I really think it is the design of the battery compartment, not just a defective unit. The battery compartment is too large and allows the batteries to flop around, causing the issues I described. Returning and going to purchase from a brand I already know and trust, which is what I should have done in the first place. I thought I'd take a chance but I keep learning you get what you pay for.