Product Description

Its bright, battery-powered laser makes rapid, ultra-precise work of boresighting. Created to meet the demands of gunsmiths and serious shooters, it includes arbors for .22- through .50-caliber firearms

Product Details

• Amazon Sales Rank: #152 in Sports & Outdoors
• Brand: Bushnell
• Model: 740100C
• Released on: 2009-02-19
• Dimensions: 1.40" h x 3.50" w x 9.60" l, .20 pounds

Features

• Laser boresighter for gunsmiths and serious shooters
• Makes it easy to sight a newly mounted riflescope
• Bright, battery-powered laser is rapid and precise
• Includes arbors for .22- through .50-caliber firearms
• Runs on 3 LR-44 batteries (included); 8 inches long

Amazon.com Product Description
Save time and money when sighting a newly mounted scope with this Bushnell laser boresighter. The device's bright, battery-powered laser makes rapid, ultra-precise work of boresighting, so you won't waste any ammunition during the process. Created to meet the demands of gunsmiths and serious shooters, the boresighter includes arbors for .22- through .50-caliber firearms. The unit--which runs on three LR-44 batteries (included)--measures 6 inches long and weighs 8 ounces.

About Bushnell
Bushnell has been the industry leader in high-performance sports optics for more than 50 years. The company's guiding principle is to provide the highest quality, most reliable, and most affordable sports optics products on the market. Bushnell product lines enhance the enjoyment of every outdoor pursuit, including nature study, hunting, fishing, birding, and stargazing. Indoors, the company's binoculars bring the audience closer to the action in fast-moving sports or the fine arts at theaters and concerts.

Customer Reviews

Has some issues, but easy to correct
I gave this 5 stars because I figured out how to resolve the problems associated with it. First, the on/off switch is horrible. The sight uses small batteries that fit into a tube and are held in place by a pointed contact and a spring. When you turn the knob to off it pulls the batteries away from the contact (feels firm). When the unit is on the knob allows the contact to connect and the knob feels loose.

The whole unit easily pries out with a small screwdriver and one can clean the contacts and lengthen the spring a bit. This will take the vagueness out of the switch and stop the laser from being intermittent.

Also, don't use an adaptor that fits exactly. Use a size smaller and adjust it until it fits the bore properly. That means tight enough to center but not so tight it gets stuck in there. If you find the exact size without having to adjust it and you force it in the barrel it may get stuck. It also takes a bit of effort to put the adjusting screws in the adaptors (one screw for each adaptor). Once in they will stay put with the adaptor.

Finally, while this is a red laser you do not have to bore sight your gun or rifle indoors or at night. It will reflect back in broad daylight against anything that's reflective, like a traffic sign. The neighbors may think you're nuts but it works great.

Once you overcome the funky switch, it works great. Just remember you will have to go out to the range to do your final adjustments. No boresight is perfect. They just get you close.

Doesn't cover all the calibers advertised
In general, I like this boresighter. I have a lasergrip on my .38 snub nose and used the bushnell to help me tune the lasergrip. Bottom line: A hole now appears where the red light was just shining seconds ago. So that is good. But the sight has had 2 drawbacks for me: (1) If you want to do accurate sighting in a pistol, the barrel may not be long enough for the conical portion of the boresight to center in the barrel. But I took a concical centering device from my cleaning kit (which prevents you from scratching the mouth of the barrel during rod insertion) and put that on the boresight. Then I was able to use this rather long boresigher in a snub nose revolver just fine. (2) The big drawback is that while the .38 fitting was snug, they evidently don't consider a .45 caliber a common caliber between .22 and .50. So I can't use this to tune the sights on my .45. Looking now for another boresighter that does that. But this boresighter will see more use on my rifles and other firearms.

Works well with slight mods and missing instructions
This boresighter is not too bad when you make a couple of modifications. The first involves that silly cam switch that so many have mentioned. Well, the fix is pretty simple - a small metal washer. Find a common metal washer (thin - about 1 mm) that is the same diameter as the LR44 battery and use it as a spacer between the switch cam and the battery.

Here's how to do it. Remove the battery compartment by gently prying the rear of the compartment forward and up. Remove the three batteries, drop in the washer, replace the batteries and then re-install the battery compartment. Now the rotary cam switch will work properly and positively.

Next, the spuds are easy to use, but not necessarily intuitive. First, you have to thread the bolts into the spuds. Be sure to use the longer bolts in the longer spuds - the length difference isn't very obvious until you compare them side-by-side. The idea here is to get each spud mated with its own bolt so that about 1/16" of threads protrude from the split ends of the spud. Then, you can thread the spud on the tapered end of the boresighter and the taper will open the spud to fill the appropriate bore.

As a previous reviewer mentioned, select a spud that's smaller than the bore. Then thread the spud onto the boreighter's tapered end until the taper opens it enough to fit firmly (but not too firmly...) into the bore. Once you place it into the bore and seat the boresighter in the muzzel, a small 1/4-1/2 clockwise turn will further expand the spud inside the bore to hold it tightly until bore-sighting duties are complete. Once done, twist the boresighter counter-clockwise to collapse the spud slightly so that the assembly will slide easily from the bore.

Easy stuff!