CVLIFE Bore Sight Laser 223 5.56mm/9mm/.243.308/12Gauge/7.62x39mm/.45acp Red Laser Bore Sighter with Batteries

Works as intended. Got my 0 done with in a couple minutes!! My only issue was getting the laser out of my Glock when I was done, but I just popped it out with a cleaning tool and it came out easily. I have no idea how long those batteries last because I did mine so fast, but it works. 5 stars because it was delivered fast, decently priced, easy to use, accurate, seems durable and the laser is nice and bright.

Since there isn't much to a laser bore sight, I figured I'd give this more cost effective model out; it turns out to exactly what it claims to in the description. I used this in my G17 and found it very easy to feed into the barrel from the top of the slide. Couple things probably worth mentioning. First, it is true that as long as the batteries are in the device, it will remain on--so take the batteries out after each use. Second, the fit inside the barrel is spot on, but it can cause the device to get stuck in the chamber. Since there is no real "lip" on the device like on the back of a 9mm casing, there is nothing for the extractor to grip, causing it to remain lodged in the barrel. If you simply grab your cleaning rod and give it a firm poke on from the other side of the barrel, it will dislodge the device. Third, this is a rather "cost effective" device, meaning you probably would be best to not slam the slide closed on it (or dry fire with it in the chamber), as this would probably damage the device. Seems to work rather well; helped me correct my rear sights that were off center a bit to the left.

Tried the 9mm in a glock 17 that was already zeroed; it was way off. I suspect it is because it doesn't seat fully in the chamber so the action doesn't close all the way and the barrel is still canted slightly upward. The 223/5.56mm version seems to work just fine, but it seats fully in the chamber of an AR. Edit: Changed to 4 stars. Was able to get the slide fully seated on the 9mm by pushing hard on the rear of the slide. Once the slide was fully closed the laser was pretty close to zero.

The laser is incredibly close to the same mark no matter which way the tool is oriented in the 9mm bore. Add in the price point makes this purchase a no brainer. Unless you like spending high $'s to make you feel good about your purchase, this is a great buy. Highly recommend.

Item arrived sooner than expected and works great. Laser sight was set up in seconds.

PERFECT. I used this in a Sig AXG scorpion to zero the optic. I removed my barrel and installed the boresight then reassembled my pistol. I slowly released the slide and it fully closed. I literally had the optic zeroed within a minutes. While doing so, I had set my optic for the smallest dot possible so that I could fine tune it to the laser dot. After removing my barrel again, the bore sight easily came out. I can’t imagine zeroing at the range vs using this cheap tool - within minutes and inside my home. I then went to the range and I didn’t need to make any further adjustments. The batteries were easily removed from the bore sight, and its laser dot was very bright. So many reviews made me wonder how it would work, but it couldn’t have gone smoother. No issues at all and I can save it for future use.

Super disappointed with this, questioning all of the positive reviews given my experience. For starters, the battery life is insanely low…laser literally only lasted about 20 mins tops before power got so low that it was unusable. Then, after zeroing my red dot I went to the range and it was way off. I realize a bore sight is just meant to get you on paper and will not give you a true zero, but it was so far off there is no way it is even close to accurate out of the box. You get what you pay for, and I should have known better. Hopefully anyone considering this reads this doesn’t make the same mistake.

Great but because theres no button u have to take batteries out to turn off, can be annoying