Monstrum Shrapnel Offset Picatinny Riser Mount with Recoil Stop Base | 8 Slot 3.5 inch

Good piece here--nice finish, no burrs/marks, lines up and mounts solidly, comes with all hardware you need plus spares. The riser height is a little non-standard (at 0.88 riser height, you'll wind up at around 2.091 over bore), which will definitely get your head up, but not sky-high like some popular mounts. If you're running an FSB on your barrel (I am), this riser will raise your optic over that without incident. I've been running my optic with full-cowitness directly on the top rail, and I gotta tell you, this riser mount will definitely take some getting used to. On this riser, I've got more of a chin-weld rather than a cheek-weld on the stock. We'll see if I cotton to it, I guess, but if getting your head up off your rifle is your goal, this 0.88 inch mount will do that. The best part is you don't have to spend $150 (or more!) on a branded mount to figure out if you really like your optic mounted way up there. Recommended.

Good mount seems sturdy and holds zero/torque

Worked as it was intended. Seems to be sturdy and mounted tightly to my AR.

I know this riser is mainly for red dots. I just bought an LPVO that came with a 1.535 cantilever mount. Because of my cheek weld I have horrible trouble staying in the field of view, because the eye-box has very little wiggle room. I purchased the .42" riser which raised the LPVO from 1.535 to 1.955. I found this to be perfect for my natural shooting position. I know it is not practical to use a riser for an LPVO, but I am not going to spend another 300-500 to get a 1.9 mount. I was not sure about this riser because it is not a big name brand. But after reading the reviews I thought, what the heck. The little box arrived a few days ago. The bolts were tightened so tight that I almost could not get them off. There is also some sort of sticker on the bottom that looks like something is rubbed off of it. So, I am thinking I got a used riser. There were no instructions. I do not need instructions but I do NEED torque specs. This equipment is imperative in an emergency situation and everything needs to be spec'd properly so it does not fail. I think you understand the point here. I took off my LPVO and leveled the 556. I attached the riser and added blue thread lock. The riser was true and level to my rail (excellent), so I guessed and torqued to 20#. I reattached my LPVO to the riser and torqued to spec at 65#. I checked the recital and saw it was still level. Again excellent. Went to the range today and shot 60 rounds and stayed true to zero 1MOA at 50 yards. I reached out to Monstrum about the torque spec and am waiting to hear back from them. I wanted to give this 5 stars but cannot with out torque specs included with the product. I really do not understand why these gun supply companies do not include a little piece of paper stating torque to _______in pounds,

I had a problem with a holographic sight mounted on the picatinny rail machined into the receiver of a modern, higher power air rifle where it was too low. I had to roll my head / cheek down to see it and that prevented a proper shoulder mount and shooting position. This spacer has nicely solved the problem as it raised the sight just right, I can now do a proper cheek weld and not have a hunched posture and when I quickly mount the rifle to my shoulder to the dot is centered and I'm on target. The riser is nicely machined, the edges were deburred and it has a good black mat finish. It fit and tightened up well with no rocking then the holosight fit on top well too. Note that I pushed the riser forward in the picatinny slots, there's slop there then also pushed the holosight forward to take up the space there too. Some people might want an exact spec (tight) Picatinny but I don't have a complaint, I move the different pieces in the direction recoil would take them so it can't move any farther then tighten (and I DO use a 1/4" torque wrench to specs so there's no question of over or under tightening!) and if everything else is correct nothing ever moves. If course only an idiot wouldn't check their zero after removing and replacing sights so it was a pleasant surprise that this riser was was machined true enough that I didn't have to change elevation at all and only windage an inch to be back on target at 85 yards. I sight in at 85 yards so I'm 3" high at 50 yards and 3" low at 100 w/ a 36gr slug @ 960FPS muzzle. For small game and varmint hunting this gives a great 'point blank' sighting method and reduces range estimation errors (without the usual practice of having a 50 yard zero and a lot of drop to estimate at 100)

Material, machining and quality is decent enough. Main problem I faced is it wasn't fully compatible with the optic I wanted to put on which was the vortex uh1. It's able to be put on but a third of the optic isn't secured to the rail. The brackets on the side that secure it to an existing picatini rail is kinda high and wide to accommodate for certain attachments. But was able to work with a aimpoint comp-m4, and probably wouldve been compatible with my swampfox liberator (aimpoint t2, mirco red dot clone). So be aware not all attachments will be compatible.

Good quality and fit have used before and like Monstrum products

This is significantly cheaper than comparable name brand products. Works well, feels sturdy. Great for plinking, the range, a little hunting here and there. Most likely not suitable for professional use.