Upper Receiver/Lower Receiver Vise Block Polymer - Combo .223 5.56
Specs & Features
Constructed of Light Weight Glass Filled Polymer
High Strength And Light Weight
Works great, good price, if you're building an AR you need this tool.
I bought this because it looks similar to one that I had used at a friends house. But this one did not lock in and stay in the magazine slot. So the gun will slip right off of it.