Monstrum Lockdown V3 Picatinny Riser Mount with Recoil Stop Base | 5.5 inch Length | 0 or 20 MOA

Came packaged well. All the slots lined up just fine. Its aluminum not sure what grade but seems to be made well. The screws set up nice and tight and held up to several full mags of 300blk. Brought the sight up just were it needed to be. Matches up just fine!

I needed a riser because a scope set too low on a rifle. This coupled with some high scope rings did the trick. I'd say it's now at the perfect height. Product is well made and does what it's supposed to. Comes with an extra screw and small wrench. No instructions, but I torqued mine to 30 lbs and it's held tight.

Perfect fit and height

If you're familiar at all with Monstrum you already know what to expect. A surprisingly quality product made to an impressive standard for absolute bargain pin prices, but with issues present that make it difficult to recommend without asterisks. Pros: - Sturdy feeling, three screws really does lock it down hard. Not bendable with bare hands even when removed from a rifle. - Occupies almost the full length of a flat top. Long enough to comfortably fit a sight and magnifier. - Lifts well clear of a front sighted gas block - Very light for how much rail it covers - Well aligned with bore axis - Cheap! Hard to overstate how cheap this sucker is for a durable long riser Neutral: - Even low lifts completely clear of iron sights. Even if the length didn't block a rear sight at gas block level, it is clear of 1/3rd cowitness position - Occupies *almost* the full length of a flat top. Short by about one picatinny groove on mine. If put all the way forward, this leaves a lot of a clearance for the charging handle. Too much in my opinion, ymmv. Cons: - No torque spec provided; seems to be made out of aluminum and I was worried about overtightening - No threadlocker included and threadlocker is needed for a mount with screws like this - huge holes on either end are visually unattractive and create a long open section that's irritating to clean were it get dirt or grime in it - Two part assembly is a fiddly to get installed. Screws are not long enough to thread and then place on to rail, both pieces need to be pinched in place and screws threaded. - While visually aligned, I'm not sure how much I would trust that alignment for a more precision rifle with higher magnification. I do not have the proper equipment to measure how well it is actually aligned. - Big and garish Monstrum logo on the side

Worked great on my rifle exactly what I needed

It is exactly what is advertized, and well made.

Solved problem height alignment of holographic sight 0f AR 15

This is my second build using a Monstrum riser. I'm a big fan of their picatinny locking system. They are solidly built from aluminum. Back in the day, we had everything "co-located", but the heads up system, used by today's operators, just makes sense. Not a huge fan of the skeletonized "ramps" some guys are running these days, though. The height allows for using the irons, depending on the sighting system.