YouTube channel nsz85 breaks it down Barney-style on using hand-tools to dimple an AR-15 barrel for set-screw-style gas blocks. Conceivably, this same method could be used to dimple your entire barrel (given enough patience and bits). I will personally leave any machining to a competent gunsmith or buy a dimpled barrel.
I, for one, will complement his video style. He breaks it down without being overly talkative (like NutnFancy) or stoic (Brownells). Simple editing, good camera angles, and most importantly – high enough resolution to see what he is actually doing.
What your your thoughts? Open to ad-hoc work or leave it to professionals?