Re: Bolt Knob???
I install quite a few bolt knobs, and agree with a lot of what's been said here, with a few caveats.
If your ADL is a sporter barrel gun used primarily as a hunting rig, pushing through the brush, I would probably advise against a bolt knob, due to the increased handle length getting in the way while you push through the woods.
Now, if that's a project rifle to be a tactical rig, a bolt knob is a good upgrade, but in good time. Until you have a good quality stock, a trigger job, and quality scope mounts, I'd hold off on the knob, just because the other things are more essential items. I recommend a bolt knob, but all in good time.
-matt