Monstrum Offset Green Laser Sight | Compatible with M-LOK

Went through several different small rail mounted lasers for several PCC setups I’m working on, all in the $140 - $200 price range… ended up returning them all. Bought this laser, I love it! I’m buying two more! You can feel the quality in the device, it’s solid and well built, and the perfect size. Monstrum just recently came on my radar, I had never heard of them before, but everything I’ve bought from them is the same high quality and well built. They are definitely an up-and-coming company to watch, their products sell for well below what they should be - I’m not complaining, it’s an awesome deal. Even if they doubled or tripled their prices I would still buy their products.

Edit: this was great until it just stopped working. New batteries didn’t help. Dead. Disappointing.I like this way too much. Solid build quality and super bright. Only ding is the position of the button is limited to up on right side or down on the left.

Was much brighter than expected for the price. I like it a lot.

This review is for Monstrum Offset Green Laser Sight | Compatible with M-LOK (Black)First off, I didn't take this to the range yet, so I can't comment on how well it holds it's zero. After I take it to the range and try it out, I may come back and update the review, with whether or not it does.I was excited to try out this laser, because it is super compact, and light. I had tried out two other lasers, but one felt super bulky, and the other felt cheap, and the strobe was stuck on.This laser fit well at the front of my MLOK rail, and sits perfectly in front of my VFG, so I can activate the button with my finger, while still maintaining a proper grip on my rifle. The laser itself, is visible enough in all the light conditions that I tested it at, including outside at noon. I could see it decently far away, and am pleased with it.My only gripe, is the battery is some weird battery I have never seen before, and the unit isn't rechargeable, but I suppose that would add more bulk to the unit. The whole reason I am going to use this item, is that it isn't super bulky, or heavy compared to the other laser units I tried out. I feel like less of a mall ninja with this unit.Overall, I recommend this laser, and time will tell how long the battery lasts, but if anything changes my review, I will come back and update it.Edit:This thing chews through batteries. I don't think I used the laser for even two minutes since I got it. It mostly sat turned off in my cabinet. I had to replace the batteries twice already, and when I went to replace them the second time, the plug that screws into the housing easily stripped, even when using the tool they provided. I contacted support, and they sent me a new unit right away, so I am happy about that. If you just use this at the range, I recommend removing the batteries when not in use, as the unit seems to be draining power while off. If you want to keep this on a rifle that's ready to rock, then I hope you have a nice supply of batteries.

Very clean lookDurable and brighWas sent with no boxxNo batteries!!!

This green laser seems to be pretty well made, mounts to M-Lok sockets (although I added my own loctite to be sure it doesn't vibrate loose over time), and holds its zero well after a day at the range on a 9mm carbine.In the bright midday desert sun, it was still bright enough to be seen clearly at 25 yards (which is WAY farther than various red laser sights that I have can be seen at).I'd recommend white or light green targets to have the best visibility... on orange/red colored targets, it became much harder to see in broad daylight at that distance (due to those colors absorbing green light... thereby appearing orange or red in the first place... magenta colored targets, if there is such a thing, would likely be even worse with any green laser).Even though this part of my review will likely apply to very few who read this, for what it's worth, if mounted upside down (with the laser above the M-Lok slots) and on the right hand side of the gun (where a left-handed shooter's right thumb would be) the laser bulge clears the foregrip of the Magpul Backpacker stock for the Ruger PC Carbine 9mm nicely! (See attached photo). It's also thin enough at the mounting bracket area to hold on top of it if needed with reasonable comfort.The description said something about rechargeable usb-c. That is incorrect and I think they may have accidentally copied it from a different product. This uses two 1/3n batteries that are common in laser sights (and you can change the batteries without having to remove the laser... which is a huge plus).Overall, for $50 at the time of this review, this is quite the steal! My only minor critique is that the on/off button does not quite have the positive tactile feedback I would have hoped when turning it on and if. But overall, solid 5 stars for the price. Very bright, well-made, holds its zero, for a very reasonable price!Update: I've docked the rating from 5 stars all the way down to 3 because I've come to realize that the batteries drain over a month or so even when not in use. Luckily, you can replace the batteries without removing the laser (otherwise I would have docked the rating even further), so if you take the batteries out after every use at the range and put them back in before next use, you'll be fine. But that means it's no longer just ready to go when needed at the ready with batteries in. That's a huge drawback to be aware of!

Good light at first but without even using it the batteries die within a couple of weeks. I’ve replaced them multiple times and am giving up and taking the laser off. Even when it’s not on, it sucks the batteries dry

Perfect product, fits very well, but unfortunately it didn’t fit my need. But very good quality.