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

I have a M&P shield .40, and a Glock 19. The 9mm in my glock 19 works great but the shield could never get a perfect line up, and when I would rotate the laser the position would change. Also after using it in my .40 I noticed damage where the firing pin would be. Leading me to believe it may have been slamming against my firing pin.UPDATE!!! The seller reached out to me and sent in a replacement for free. Testing the new one out it seems to be running perfectly. They provided great customer service.

Would not chamber in xd40 cal . Great concept poor fit and design..Customer service was very fast in getting with me concerning my problem. Sent several correspondence emails to troubleshoot and diagnose the problem. Thanks again for the help.

Good product. Good service. I previously left a bad review but y'all can ignore that one. Wrong product review.

I purchased the Bayattoo Bore Sight 9mm .40 S&W Laser Sight Red Dot Boresighter. The .40 caliber laser was not accurate. It was off by about 35 degrees. I contacted customer service and they replied back within a couple hours (in the weekend) and sent out a replacement. The new one arrived within two days and it was perfect. I like companies who stand behind their products. I highly recommend them.

While the price was great, the actual product itself doesn't seem to work well with certain firearms. I tried using the .40 S&W laser bore sight on both my Glock 23 and Sig Sauer SP2022 (.40), with the same results for both.The laser points roughly 8-10 inches to the right of center mass on the target from 15 yards. This happened for both guns. I don't even know how that's possible. I know my iron sights are not off as I was able to shoot one inch groupings directly at center mass from the same distance.Update: What I found with regards to the Glock and Sig was that the boresighter rests too loosely inside the chamber of the barrel on both guns. When the slide returns forward, it presses on the back of the boresighter, causing the laser to move off center, to the right. Now, the laser itself is accurate, but the housing of the boresighter is not snug enough inside the chamber to prevent significant movement.Due to the company's attempted efforts to try to resolve this issue, I am giving them a more positive review. Although this particular product did not work for me, I will still recommend The Bayattoo Store as their customer service is outstanding.Company = A++Product = B-Customer Service = A++This product might very well be good on other firearms, but through my experience, it doesn't seem to work well with a Glock 23 and Sig SP2022. If you are an owner of these two model of firearms, just be advised of the possible issues you might encounter with this product.

Product arrived on time. Well packaged. Easy to use. Sighted in optic easily. Great value. I recommend this product 👌

The price was great, received both 9mm and 40 S&W lasers in a nice metal case with 10 batteries. The batteries installed well and laser worked well. The problem came when trying to get the laser into the chamber…it was all but impossible to get the chamber to fully close. Gently didn’t work, and I had to let the slide slam into place, but the retractor never did grab the laser cartridge. I was concerned I may damage the extractor, but don’t believe any damage occurred. Once in and fully engaged, the laser dot was a good 6” off where the factory sights were pointed at a wall only 10’ away. I extracted and reinstalled the laser and came up with different but equally poor results. Since my factory sights are difficult to adjust, I installed a green laser sight and sighted that to the bore laser. The green dot sight and factory sights were very different, and the green dot matched the bore laser so I could compare to see which was more accurate. As it turned out, the factory sights weee very close, and the green dot laser which was sighted to the bore laser was off the paper at 25’. In fact, it was more than 12” off at that distance. As a product designed to replicate a cartridge, it failed. As a product designed to help the sighting in process and save rounds, it failed. I have used cartridge laser sighters in the past successfully, but these products are a complete waste of money…regardless of the price.

The 9mm bore sight fit perfectly in all my 9mm guns. However the .40 S&W bore sight did not fit my S&W SD40ve. It's to long to fit all the way into the barrel of the gun properly, but I was still able to us it to site in my gun.