If you are looking for a tool to help you with maintenance of your AR-15/M16 lower receiver, this ProMag® AR-15/M16 Lower Receiver Magazine Well Vise Block may just do the trick. By locking this ProMag® AR-15/M16 Lower Receiver Magazine Well Vise Block in your vise grip you have easier access to your firearm to adjust or install whatever parts are needed. Sliding this ProMag® AR-15/M16 Lower Receiver Magazine Well Vise Block into the rifles magazine well is easy and is kept in place b [...]