Well made, precise machining.
Very well-made. Precise machining, and a good durable finish. Good value for the dollar.
Buy Brownells not Yankee Hill
Bought the Yankee Hill and it wobbles on my AR rail. Tried it on every other rail I have and it wobbled on all of them. Bought Brownells and it clamps on tighter than a fishes butt. The bolt is large and sticks out a bit more than I would prefer and it is heavy, but obviously well constructed. The Yankee Hill has good reviews about synching down tightly...I have no idea why. If you want to use the Yankee Hill you have to unscrew both screws with an allen wrench almost all of the way out. It is way too painful to do all that for it to rattle when you move your rifle. The Brownells is much easier. Just the single screw to tighten by hand then with a screwdriver for a few turns. Easy, simple and stable. Do yourself a favor, buy Brownells.
Superb Quality!
Used this to mount a Sig STS-081 red dot sight to my S&W 15/22 rifle. Worked perfect! 1/2" height of the mount, lined it right up with the sights, which are now the back-up sights. Thanks Brownells!
44 CARBINE BASE MOUNT
I BOUGHT A ONE INCH HIGH MICRO MOUNT FOR THE 44 CARBINE THAT I HAVE. ITS JUST TOO HIGH. I MEASURED THIS HALF INCH HIGH RISER AND IT WAS PERFECT.
Just what I needed
I have an Armasight Apollo Pro Clip-On thermal sight that I mounted a 3x magnifier behind so I could use it to scan with while not mounted on my rifle. My 3x magnifier was not lined up and I wanted to center it with the thermal scope so I bought this riser. The riser fit easy enough on my extended picatinny rail but when I tried to remount my Eotech 3x magnifier I found, as other have noted, that the top part of the rail is a hair too wide and the Eotech can not be installed on this rail riser. Luckily, I have Vortex 3x magnifier with a different mount and was able to install it instead of the Eotech. I am not sure why it is too wide for the Eotech but it is. Since the Vortex mounts to it, I am all set and don't need to get anything else. The riser puts my Vortex 3x magnifier "dead center" with the thermal Clip-On. Added a couple of pictures to show how it is mounted.
Not good for Burris eliminator
Not a good choice if you need the tops level. As I tightened this on an Aero upper the side with the nut raised up. Seems to be due to the geometry of the clamp portion that tightens up against the main body. This isn't an issue if you are using scope rings since you can just level the scope. This is not a good option if you're trying to mount a Burris eliminator that mounts via clamp on the bottom, hence the need for it to be level.
Shoots loose
450 bushmaster shook it loose don't want to use tread locker as defeats purpose added a lock washer problem solved. Also Leupold QRW and PRW seats up on the cross block not the ring base. And if your top set is also a bolt down or lever you have to reverse one of the sets do to clearance issues of the lock nut
Not in spec
While the top portion of the rail appears to be ok (i.e. in spec), the bottom part is not. I'm not referring to other reviews that mention the clamping issue (although that is also a problem). The issue here is that the shoulder that forms the top of the rail clamp is too close to the pic rail, so many (well-made at least) items cannot fit on top of this. Tried three different items by Trijicon, Unity and Reptilia, and none fit on this due to the lack of clearance. Because of the cost to return vs. the cost of the item I'll just toss the part and eat the $, but save yourself the trouble and buy something else.
