MonstrumLockdown Series Adjustable Height Picatinny Riser Mount | 5.5 inch

Added height helps cheekweld while wearing muffs

I liked everything about this riser, other than the bolts used to tighting it to the rail on my rifle. The bolts are made of extremely cheap metal and stripped when tightening them by hand.

I’ve used these several time and finding that even after forcefully tightening they work themselves loose. It could just be me or maybe I need to add thread lock but these are finger style nuts with a slot to insert something like Allen wrench to tighten securely. Well made other than that but they are now in my odds and ends box.

This product is great for the money. The only complaint I have isn't so much about the product, but that I made a mistake on my part. The component doesn't fully line up on the railing as it transitions from the upper to the hand guard system. Since I have a rear iron-site installed, I couldn't put this far enough back to properly seat it flush, however, because I'm able to adjust the height from the two screws, I was able to offset the angle enough to level my scope back out. All-in-all, a great product, just make sure you check your railing if you find yourself in the same situation as I did. I ended up just ordering 45 degree offsets for my iron-sites to fit this raiser better for my scope.

This thing is built like a tank and holds true. For the money, it's ability to height adjust is perfect. If you've got an optic height issue, this will do the trick.

I ran several mags through my AR10 using this riser and it worked like a dream. I took it home to move it further back on my rail and one of the bolts snapped in half when I was tightening it back. I contacted customer service and they said they would ship me a replacement asap, and they weren't lying. I received it in the mail in two days. Good product. Good customer service. Would recommend.

Nice sturdy riser. Great fit and finish. Positive lockup though I believe I will locktite the adjusting screws once I determine the final height. Large head mounting screws with coin slot and springs are a plus.If weight is an issue then be aware that the large one I bought weighs in at almost half a pound. I deducted one star because the adjusting screws interfered with my scope mounts in the lowest position.

You will need a wrench .... I zeroed my weapon and after 10-12 long shots it had come loose. Just wrench it down tight (or loctite) is down before you zero