Originally Posted by
Parabellum9x19mm
i have the 40L on one rifle, where the 40L was pretty much the only BUIS that would fit under the ocular lens of my scope. its not bad. i dont like the "mousetrap" release on it tho. seems like it would be tough to deploy while wearing gloves or under the stress of a firefight, as it is a fine motor skill.
a minor gripe is that it is held up by spring tension, and doesn't really lock in place...but that doesnt really matter much, more of a preference thing.
if you need a really flat BUIS, the 40L is pretty damn low