I'm building a dissipator, too, and getting the barrel maker to attach the FSB is money ahead. They have the tools, expertise, and know exactly what part to order.
Me, I've spend $45 more on drill bits, stones, and stumbled over unexpected issues. I could have bought a clamp on sight and been finished for the same money. There are some things easily done building an AR, and you don't need special tools for most of it. But, mess with getting a GI FSB where you want it, expect it to be very educational, and budget double.
Drilling and grinding forged steel, and getting it aligned to sight in properly is not an easy task, requires upper level skills, patience, and some expensive tools if used on a one-time basis.
As for the rest of it - vice grips with taped jaws insert roll pins, used drill bits can tap in and center them, the front push pin can install it's detent, a pair of channel lock pliers can tighten down the barrel nut.
Pinning the FSB to the barrel, you need a jig, expensive bits, a drill press, and experience to pin one on. Just clamp it if it's a recreational gun. There's $50 saved right there one way or another.
Another $50 saved is a milspec flash hider, $8, all the aftermarket ones are no less than $50 plus shipping. Upgrades are exponentially expensive for the incremental return.
