Really the best tool for the job - Guntec USA Breaker Bar/Socket Wrench Adapter

I'll put it very simply: if you're getting a Guntec ultralight handguard, get this tool for your torque wrench. That's it. Period. Seriously, you need it. My reason for knocking off a star, and this is actually a big complaint for me, is that these should come with the handguard and not as a separate piece. It is just that necessary for proper installation