Bushnell Laser Boresighter

 (405 customer reviews)

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...Read more

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"...Read more

Let's start out by reminding everyone that this is $25 and not $300. Try to remember this. I've read most of the negative reviews, which prompted me to write this one. Yes, I own and have used this product many times. Bushnell had to find a way to manufacture this product cheaply so that they could offer it to you at this price. Do you all still remember, it's $25. OK, don't look at the front and say it's misaligned because the laser lens isn't centered in the opening of the housing. Doesn't mean a thing. Don't say the arbors fit loosely in the bore because they are expandable. That means you take the one that most closely matches the diameter of the bore, screw it onto the end of the bore sighter until it makes contact with the taper, and then continue to turn it down with the Allen wrench so that it begins to expand. Keep checking the amount of expansion until it fits your bore. And for gods sake, don't spin it in your drill to check calibration. You can't do that. You are assuming...Read more