Sightmark RimFire Brass Boresight with Red Laser

works fine on a 10/22 RUGER has good battery life easy to load in and mount adjustment good sights were almost dead on at 200 ft bright laser

This little boresight is awesome! You have to take your time and be patient. I placed it in my Savage Arms to sight in my scope and it is a little difficult to get in and out of the chamber, but patience is a virtue. Once I got it in and placed the laser on the bulls eye at 25 yards, sighting in my scope was a breeze. I used it to sight in my new Nikon P-RIMFIRE BDC 150 reticle scope and had it sighted in at 25 yards in 2 shots and less than 10 minutes. I spent more time putting the boresight in and removing it than I did sighting in the scope. The laser is bright and easy to see at 25 yards. I will be using this to sight in another Nikon scope on my Ruger 10/22. Well worth the $, and although I have not used the mini boresight that looks like a thermometer, I can say that this type seems easier and more accurate to me if you just need a boresight for .22 LR or .22WMR. I like it. You have to be careful not to pull on the cord or slam it in the action when placing it in and taking it out but like I said, "with patience", it works great.

Bought this to sight in a .22 LR. The first one I got was used and broken. It looked like they accidentally let the breech close on the wire. It should always be locked back when using. This bore sight gets you very close and to zeroing. It sits a bit loose in the bore, which requires holding it centered in the bore. I like it and use it whenever I zero in my .22’s.

I tried the magnetic kind that go outside the bore, (don't bother wasting your time on that! They scratch your gun, overpriced, and inaccurate). This product however works great, it is plug and play. It does seem to aim high, but I don't know if it's due to bullet drop or physics. Aside from that, side to side it is centered, and I like that you can turn it on and off by the switch. I would have liked to have had a thicker cable, but I haven't had any issues. I tried cheap laser sighters, I tried really expensive laser sighters, and they all failed terribly. This is the one that was just right in terms of consistency and functionality. I wish I'd tried it first, it would have saved me a lot of time and effort!

Is simple to use and protect the wire. This works for any laser boresighter whether it has a wire or not. Cut a small bit of cloth rag. I used an 8" x 6" piece of a pair of athletic shorts. For larger caliber & wireless sighters a much larger rag can be used. Lock the bolt back. Put the sighter in thru the ejection port. Roll the rag & push it up thru the mag well. For wireless sighters you can jam the rag in through the ejection port. Slowly (very slowly) let the bolt compress rag against the the sighter. Push the rag toward the far wall of the receiver so that it doesn't stress the wire but securely holds the sighter in the chamber. (This step doesn't apply to non-wire sighters.) I wasn't impressed with the storage case - I think it is it too small and will stress the wire to use it. (But it is a good size to put other wireless cartridge type sighters in.) I very carefully opened the package so I could store the sighter in the clear plastic it was packed in (with the sighter appendage part removed).

So this thing is a great idea in concept. Was looking forward to zeroing my new scope before wasting a box of ammo trying to even get the thing on paper. Unfortunately it's kind of a poor execution in practice. Firstly it's very difficult in my semi auto rifle to get this into the barrel. It just BARELY fits and I have to use a pair of hemostats to get it lined up. Secondly it has a ridge on it that doesn't sit exactly flush with the end of barrel. So I installed it and then I get a fuzzy half moon shaped light coming out the other end. I have to lock the action back, and then fiddle around with it until I get a solid laser dot. VERY carefully don't move anything and then zero the scope to the dot. I was hoping this laser would load like a bullet and sit snug in the barrel. That is just not the case. I have seriously considered returning it, but unfortunately I don't see anything that is much better of an option. I can't bore site the gun as I can't see down the barrel with the action removed. Just the way my gun is designed. So I give it three stars. It sort of works but it's not exactly what I expecting. It's very fiddly and hard to install and remove. It has to be aligned just so for it to actually project a solid dot through the barrel of the gun.

The best I have used. Far more secure than the end of barrel type. Gets you close and priced fairly. Bright, and no tiny watch batteries. Very nice.

This is exactly what I needed to sight in my .22's. The wire comes out at a 90 degree angle from the laser so it shouldn't get cut or smashed by the bolt. I do suggest not pulling on the wire to remove the laser from the chamber. I used a cleaning rod to push it out. It fits very snugly in the chamber. In reading the other reviews I was concerned about the laser being off center. I sighted in the scope with the wire at "3 o'clock". I then pushed the laser out and put the wire at 5 o'clock then at 1 o'clock. The zero did not change at all. I was sighting it in at 25 yards. Previously I had used one that went into the muzzle and referenced against the muzzle device. It was not nearly as accurate as the chambered laser. This device will save me and my friends lots of time and money at the range. I think it is well worth it and suggest it to any serious shooter. I have other Sight Mark products and this is the same high quality as they are.