We go to the range over here with our personal weapons (contractor supporting the Coalition Aviation and Afghan Air Force) and we could test anything over here! Let's check out our 5.56 M4s/CZ805 (Czech) and the AAF's 23mm Geisha Mi-17s. Just send the stuff over here and we will really test the survivability. I agree the stock stamped steel did perform better than I expected! PS covers are definitely solid and mount flush. I've only seen one rig catch a lip of the stock cover and lose some HD oil; we were able to hammer it back in shape and used some type of sealant until we could fix it. Of course, we decided this was one-in-a-million and wouldn't expect it to happen except in sheer bad luck!