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SightMark Laser Bore Sights Cartridge Sizes: SightMark AccuDot Laser Bore Sight - 223 Model SM39001
|Price:||$24.99 & FREE Shipping on orders over $25. Details|
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- Compact 0.223 Boresight designed for fast gun zeroing and sighting
- 15 to 100 yard sighting range
- 632 to 650 nm laser wavelength
- Sturdy brass construction
- Comes with carry pouch
- Class IIIA laser; 5mW or less
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The Sightmark Laser Bore Sight provides the most convenient and accurate method for sighting in rifles of all types. Simply chamber the bore sight like a regular bullet and a laser dot will show exactly where the rifle is aiming; it’s easy to sight in any scope without firing a single shot. Live fire is only needed to fine tune the weapon being sighted in order to compensate for inconsistencies, such as bullet drop due to distance. Perfect for hunters, competitive shooters and law enforcement, the Sightmark laser bore sight is sure to take the frustration out of sighting in almost any gun. It’s easy to use and will quickly save both time and money by avoiding prolonged live fire tests at the range; use the extra ammo for honing those shooting skills and for the hunt. A lightweight carrying pouch protects the laser for convenient use in the field. The Sightmark laser bore sight is available in several calibers and gages for use with all the most popular rifles and shotguns.
The Sightmark Laser Boresight provides a convenient, accurate, and cost effective method for sighting in rifles and shotguns of all types. Easy-to-use, simply chamber the boresight like a regular bullet and a laser dot will show exactly where the rifle is aiming--without firing a single shot. Perfect for hunters, competitive shooters, and law enforcement, the Sightmark Laser Boresight offers a 15 to 100 foot sighting range with a 632 to 650 nm laser wavelength. The boresight comes with a lightweight carrying pouch to protect the laser for in the field.
- Laser Wavelength (nm:) 632 to 650
- LED Type: visible red laser
- Sighting Range: 15 to 100 yards
- Dot Size: 2 inches at 100 yards
- Operation: On/Off End Cap
- Construction: Brass
- Temperature: -10 to 50 Celsius
- Power: <5 mW
- Battery Type: two AG5 or three AG3)
- Battery Life: one hour
Top customer reviews
I purchased this bore sight for use in my Colt Competition CRZ (.223/5.56). It was delivered this morning and I was anxious to try it out so I opened the package, read the directions, added the batteries and inserted the laser into the chamber. Immediately I noticed that the dot on the wall 5 feet away was at least 5 inches across and not a clean well defined laser dot. I removed the sight and aimed it at the wall and when not in the barrel, the sight rendered a clean dot as you would expect so I re inserted it into the barrel and I got the same dismal result. Then I noticed the dot was shining on the muzzle break. The laser didn't even make it out of the barrel clean.
I wanted to check the laser alignment so I set up a plumb line from a doorway. After carefully leveling a small table to hold the sight, I placed it under the plumb line and found it to be at least 2 inches off at 64 inches. Maybe this is the only one like this but this is the second one I received after returning the first one because the packing was opened.
I am returning it today. Maybe I'll just stick to the old fashioned way of sighting the rifle.
I returned number 2 and received a 3rd sight. This one seems to have an acceptable measure of accuracy. At 50 yards, it seems to be about 1 inch off the actual POA. I don't have a longer range to check it. I'm upping the rating to 3 stars because the variance between sight number 2 and sight number 3, plus the problem with #1 mentioned above. I don't love it, but it's OK.
I had used a Bushnell laser boresight before getting this set of chamber loaded laser boresights. The Bushnell is the kind that you stick into the muzzle end of the gun, fitted with an arbor matched to the barrel size. The problem with this device was that the arbors never fit quite right - they were always either too tight or too loose, plus you had to try to seat the body of the boresight in the center of the opening of the barrel (or muzzle brake) in order to properly align the center axis of the boresight with the center axis of the barrel. This rarely if ever happened just right as the slightest tilt in the seating of this boresight in the barrel would take it off the center axis so that rotating the laser would cause the laser light to mark out a small circle that was several MOA in diameter rather than being dead centered. Ugh.
Of course with these chamber loaded laser boresights, there is also the potential for the lasers to be mis-aligned off the center axis. Plus there is the potential for the boresight to not fit the chamber properly. The key is to find a brand that has a measure of quality control so that you aren't stuck with these problems.
I read through a lot of reviews before deciding on Sightmark. It is definitely not the cheapest out there. There are so many different brands and generic versions of these chamber loaded laser boresights now that almost look alike, with many much cheaper than the Sightmark. However, it was clear from reading the reviews that as the prices went down, so did the quality control. Several of these cheaper brands came with complaints that the lasers were not aligned to the center axis (resulting in the laser painting a circle as it rotates in the chamber) or that they did not fit properly in the chambers and so would either get stuck or wiggle.
I have this theory that the really cheap laser boresights must be factory seconds or some such.
I considered the Osprey line with the adjustable arbors, which saves money by allowing you to use one laser bore sight for different calibers. But, the reviews indicated that hassling with arbors would have an effect on accuracy and reliability.
I almost got the Firefield, which seemed to have a similar number of decent reviews. Ultimately I decided against it because the entire line is made of an aluminum shell, and I think the brass shell of the Sightmark will hold up better.
It should be noted, however, that the 12 gauge Sitemark is made out of aluminum, unlike the others, and is only painted a brass color.
The biggest complaint against all of these laser boresighters are the frequent DOA batteries and poor battery life. The Sightmarks all come with alkaline button cell batteries. The small caliber ones (9mm, 7.62mm, .223) come with two AG5 batteries while the 12 gauge came with three AG13 (LR44) batteries.
To get you all confused, the printed information on the back of the packaging for the 7.62mm and .223 says you can use 3 AG3 batteries in place of the 2 AG5 batteries (since the AG3 is a thinner battery with the same 7.9mm diameter), while the printed info for the 12 gauge says you can use 2 AG5 or 3 AG13 batteries. This is flat out incorrect since 2 AG5 batteries are too small to fit into the 12 gauge Sightmark battery chamber.
Confused? Go to wikipedia and look up the article "List of battery sizes". Scroll down to the section titled "Silver oxide and alkaline cells". The table lists all the different names for each battery, their dimensions, and their mAh power rating. Note how the silver oxide batteries contain 1-1/2 to two times as much energy as the alkaline batteries.
So the key is to go out and get some silver oxide button batteries, size SG5 for the AG5 powered Sightmarks and SG13 for the AG13 powered lasers. And don't go to your nearest retail store, since that will cost you an arm and a leg. Google shop for these batteries online. I found two Made in China "brands" one called Vinnic and another by Chung Pak Battery Works which were pretty cheap. The names aren't important, since I'm sure they will change rapidly. Just remember to get some silver oxide batteries online at the same time you are getting these Sightmark bore sights.
How well did these Sightmarks work? The very first time I used one (the 7.62x39mm), I plugged in the included AG5 alkaline batteries and the resulting laser light was exceedingly weak. My initial reaction was that this was a bad laser. Then I remembered the silver oxide batteries I had gotten. When I switched out the batteries, the laser suddenly glowed brightly. Later, when this set of silver batteries finally wore down, the laser light faded again. That's a sign to change batteries.
The larger AG13 alkaline batteries for the 12gauge shotgun boresight worked reasonably well and are still working as of this writing. Not surprising, since these batteries pack a lot more energy than the small AG5 batteries.
As many have noted, the Sightmarks do not have an on-off switch. Once the batteries are screwed in the laser light is on! This is just as well, since the bore sights have to flush fit inside the chamber of the barrel and endure having the bolt and firing pin slammed into them. But you do have to have a plan of action ready so as to not run down your batteries. With one pair of SG5 silver oxide batteries, I was able to adjust the sights for about four guns, each taking about 5-10 minutes. So I am guesstimating a battery life of about 30 minutes with a fresh pair of SG5 silver batteries (the Sightmark packaging claims up to an hour of battery life - hah!).
All of the Sightmarks have fit in well, none have gotten stuck (so far), and none have had off-center lasers.
These chamber loaded Sightmark boresighters make it easy to dial in a scope, and for fixed sights, they help confirm the aim points. They are much better than the muzzle loaded bore sights, although the total cost is a lot more since they are ammo caliber specific.
Be careful not to fully close the bolt on an AR on this bore sight. Ease the bolt down SLOWLY. However, still having the bolt close on the bore sight is very easy to do. Like other persons leaving feedback, I also had issue with the bore sight getting stuck. This happened twice, on two different uppers. Note: to dislodge it, you need to pull the charge handle down, while striking the butt plate of the rifle squarely on the ground to dislodge the bore sight.... I took my optics off first.... I would NOT try to push a cleaning rod down the bore.
So over all, it is a good bore sight. Does what it is meant to do, but it can get stuck. Also, at $ 28, it seems a bit overpriced - IMHO. But it was accurate, no issue with the laser being off. If they could improve the sticking problem, it would be great. I have heard other brands can do this as well. Good Luck Guys and Gals....