Looking for a way to work on your upper receiver?
With the MI-URR you can install forward assists and dust covers without having a barrel installed.
This tool also works great for barrel nuts and muzzle devises as it has a spline that goes through the charging handle slot and takes the stress off of the barrel extension index pin.
https://www.midwestindustriesinc.com...s/MI-URR-2.jpg
https://www.midwestindustriesinc.com...d-p/mi-urr.htm