Tipfun .22LR/.177 Cal/ 9mm /.375 Cal / .41 Cal / 40sw/10mm Red Laser Boresighter Bore Sight End Barrel Easy to Fit Revolvers Pistols Rifle and Air Guns with Batteries

Almost passed on this because of the price, ended up canceling the order and buying a fancier, better-looking laser bore sight instead — that was a mistake. The expensive one didn't perform any better and ended up going back, so this one got reordered anyway, which was just wasted time that could've been skipped by trusting this kit the first time around. Quality is solid for what it is, the cartridges seat properly in the chamber and the laser holds a consistent point of aim once it's dialed in, nothing wobbly or inconsistent between uses. Ease of use is straightforward once you know one thing that isn't obvious out of the box: there's a protective sticker on the battery contact that has to come off before the unit will power on, since the contacts need direct metal-to-metal touch for the laser to activate — leave the sticker on and it'll just sit there looking dead. Even better, swap that sticker out for one of the included O-rings instead, it seats the battery just as well while doubling as the right-size spacer for the caliber cartridge you're using, so that solves both the power and the fit at once. Battery life has been solid so far across multiple sessions without needing a swap. Appearance is simple and functional, nothing fancy, but it doesn't need to be. Durability seems fine too, the cartridges haven't shown any wear or looseness after repeated chamber and eject cycles. Ran this through my FN 510 in 10mm auto and it zeroed up fast and easy. Covering this many calibers in one kit at this price is genuinely hard to beat, and the value here makes the pricier laser bore sighters a much harder sell.

I bought this specifically to dial in my armalaser I bought for my S&W bodyguard 2.0. My standard laser bore sighter was too long for the tiny barrel. This worked amazing. Definitely recommend especially for micro .380 handguns.

I have not used it yet but it looks like it will do the trick.

The instructions do not explain how to get the very small O rings over the large end and into the O ring groove. I am tempted to cut them but there must be a better way.

It fit my S&W 40 and all of my 9MM’s. The rubber O-ring was not easy to change but the quality is great and the red dot was very bright. It is great if you have more than one caliber of gun.

The bore sight is easy to use, puts me on paper at the range, so I can spend my time and ammo making fine adjustments to my scopes and red dots.

This thing is SO far off-- at 10 FEET (yes, 10 >feet<) its off by at least 1 foot left and foot high. I don't know what the mounted inside the laser housing, but its nuts how off this thing is. No way I can use it to dial anything in. ** Correction!! Once I used the proper O-Rings to seat the thing, it was spot-on, both on 9mm and 10mm, and it was compared with my Bore-Sight... The issue is that its not "obvious" which O-Ring(s) to use-- and they are a bit fragile. For the 10mm I had to use a "thicker" O-Ring-- it required me to use needle-nose to spead it to get on the device. They include some others (white) which when spread just break in half (And, at least I couldn't get them over the device itself :shrug:) BUT-- for $13 bucks, its not bad-- HOWEVER, for $25 bucks: https://www.amazon.com/dp/B0874FJS7Q?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 Does the job, and I was able to use it on 9mm, 10mm [ ** 5.56(.223) WILL NOT FIT ** ] with ease... It's pretty obvious (to me) which one to choose, unless $12 bucks means that much to you...

Can't beat it for $15 on the paper. 9mm 10mm and 45s