I just got in a MAGPUL BAD Lever and I installed it which was pretty easy. I have been playing with it through the day now and I have to say I really like it. It probly shaves about .4 of a second off a reload an you don't have to reach over or under or switch hands to lock the bolt back. I know .4 of a second doesn't seem like much to some I do three gun competitions and every little bit of time counts. For $30 it's a neat upgrade
http://www.youtube.com/watch?v=G02WjXBmoss