A must have for changing barrels - Vism Upper Receiver Block For Ar-15

This will be the second one of these i have bought. ...........................It is for a gift. After getting tired of seeing my buddy(not Trevor)wrestle around on his bed like a greased hog, trying to put on a barrel with some forsaken wooden contraption as an upper clamp, I decided to inform him there was an easier way(after watching him struggle for a minute). I presented my 1st example of this product. As it has served me well I showed him this simple yet effective piece of equipment...and a torque wrench. As many, he tried to build an AR as cheaply as possible so, I gifted him mine as I don't want to see any AR turned into a pretzel, and bought this as a gift for myself. This is a very durable piece of equipment and my only qualm is that the anodized finish comes off fairly easy. Such a pretty blue too. Anyway, it doesn't hurt the integrity. The cleaning feature is a nice little feature too.