Sturdy, easy to use, locks on tight, - American Defense Manufacturing AD-B3-C Cantilever ACOG Base

I was worried with only one lever used to hang my ACOG on the picatinny, but it's solidly mounted. It took a few turns of the lock nut to get the right tension, but the lever operation is smooth and secure with the anti-unlock button. Well built, all metal construction, everything is tight. With the cantilever I'm able to get much more eye relief and as importantly, it sits high enough to be out of the way of the charging handle.