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

I needed a quick, easy, and budget option to set up iron sights on my first 5.56 AR and this CVLife Bore Sight Laser for 223(5.56) did the job very well. It's still essential to go to a range and dial in a zero at proper distance with live rounds, but this will get you on paper and save range time and ammo. The package includes a laser cartridge in 223(5.56) and six batteries. The cartridge takes 3 stacked batteries at once, and each set of 3 batteries lasts approximately one hour, so 2 hours of total use from included batteries. Function: Simply unscrew the endcap from the cartridge, insert 3 batteries, screw the endcap back on, and your laser is on. Once the laser is functioning, you simply place the cartridge into the receiver and *gently* ease the bolt forward until the cartridge is fully seated. You don't want the bolt slamming the laser cartridge into battery as you would a live round. Your chamber may not fully close, but that's ok as the cartridge simply needs to be held in place by the bolt and centered in the bore. You now have a red laser dot shining out of your barrel to which you can sync your iron sights or red dot. I only have about 20 feet of "targeting" distance in my home, so I was mainly concerned with getting the windage adjusted on my iron sights as accurate elevation would be near impossible at this close range. But now I can go to the range with a little more confidence in my initial accuracy and begin the real work. Verdict: Since you'll need to go to the range anyway, this laser cartridge offers an easy starting point for zeroing your sights at a budget price. Checking the alignment of sights between range visits is also a viable use option, but this functionality would be improved with the addition of an on/off switch as removing and installing the batteries for each use is a little cumbersome. At 20 feet the laser is very bright, but somewhat "fuzzy", so I'm unsure how accurate this would be over longer distances. Overall I am very happy with this as it does the job advertised, just be advised that it is only the beginning of the zeroing process. I expect to use this often.

This works great. Good price, battery life is great, the laser is bright and easy to see. It fits perfectly in my 5.56 rifle. I couldn't ask for a better sight laser. It gets it as close as possible without putting rounds down range.

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.

Works fine. It would be a 5/5 if it had some sort of switch on it. Taking batteries out isn’t fun.

I should have bought this type of (chamber) bore sight a long time ago. It’s way more accurate than the type of bore sight that you insert into the end of the barrel, for multiple calibers barrels. As I have noticed with bore sights, the lasers are not very strong , so I tend to use them in low light or at night just to get the optic close. At night the laser will easily reach out to 50yds or more. During the bright of day, not so much. I will probably buy a few more calibers just to have based on the accuracy over my other bore sight. Update: I bought the 7.62 to add to the 556. These are awesome bore sights. Chamber bore sights are the best option and are dead on with accuracy. I end up sighting my optics at night. I can easily see the laser at 100 yds. Just range something at your yardage and put the laser on it. You’ll see it no problem through the optic. Adjust until the dot is centered with the reticle. So simple.

Great product. Has an extra set of batteries and does what it should. Will save you many rounds at the range sighting the n your rifle.

Worked alot faster than a typical muzzle bore sighter. Made sighting in a breeze and no wasted bullets trying to get it on target.

Not well centered, even in roughing in it is quite off.