The advantage of a precision bubble level is undeniable, but so often they get in the way. With the innovative Tactical AR Tru Level from Xtreme Hardcore Gear, that issue is gone. The Tru Level is machined to fit seamlessly with a flattop AR-15 and is shaped to contour with the top rear of upper receiver without interfering with the charging handle latch. This level requires that there are two open picatinny slots for proper attachment and clearance from the mount or rings.