AR gas block holder

One step of assembling an AR-15 is to clamp the gas tube into the gas block by pressing in a roll pin. That takes a lot of force.

This print holds the gas block securely so you can press/hammer the roll pin. Designed to fit a gas block from Aero Precision, but should work decently well for others too. The print was intended to be held in a vise, but also works standalone.