Given the success of the double-ender in other industries we decided to take a stab at it. Works for both AR-15 and AR-10-size barrel extensions.
View attachment 193073
https://truenortharms.com/products/torkey-tool?variant=12228034330732
At first I was like how do you clamp that in the vise??
You could probably make the flat spot 6.5" so it will fit in a normal vise horizontally.