Low Profile Picatinny Bubble Level, Anti Cant Indicator

So simple, yet so effective! You will not regret it! Very good quality, I'm impressed!!

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I use this for medium range, slow projectile practice (multiple calibers). It does well enough from 1-400 yards. I haven't stretched it yet. One gripe I have is that if you are mounting this on a top picatinny rail, the bubble is very short and on my particular set up, it's a little bit too covered by the optic. I recommend either placing the optic more forward if you can, or mounting it to the optic itself.

I now own several of these. All that I have purchased have been accurate. I test them on a very accurate machining level and they've passed. These are great to tuck under your scope at the rear of a picatinny rail. In this location they are very easy to view as long as your scope isn't too long. I keep an extra around to use as another reference to level a rifle when I'm mounting a scope.

**Full disclosure** I only bought, tested, and used one of these, and there is a chance that I merely received a defective product.I purchased this for my .308 cal AR-10. The item came nicely packaged in a small but sturdy and reusable clear plastic package/case. I installed it on my rifle, but after 5 rounds I observed the bubble level had dislodged and popped out of the mount. I can probably fix it myself with a good epoxy or JB Weld, but I shouldn’t have to. It needs to be more durable. It is also hard to see when it is mounted under the scope, but would be sufficient if mounted on top of a scope ring. If you’re working on a tight budget and don’t mind the DIY durability improvement, then it’s not a bad purchase for the price.

When tested with a digital level, I found this product with pour level accuracy . I kept the digital one.

John is comparing the scopes levelness to the upper receivers levelness but never uses the same level on both. You can't compare this scenario.... Just because you "see" it level using a plumb bob does not mean it's actually level of your rifle was not level to begin with. Cart before the horse here...Search YouTube for "Complete Guide to Mounting a Riflescope to an AR-15 ft. Jerry Miculek". And then watch "Everyone is Wrong! Level Your Scope with One Simple Trick Cost Free" and think about it... The second one says to level to how you hold the gun, but that's not a guaranteed repeatable thing, but checking your level on your rifle using a device like this IS repeatable. Listen to Jerry.. he knows a thing or two.. if you don't know who he is I'd suggest watching some of his vids, very good info for newbies and "pros"... ;)

Works Great on are AR's