Ok, so I watched some more YouTube videos, and there appears to be a HUGE difference in the muzzle blast between the 18.5 and 24" barrels. I think I might go with the 24" anyway, unless someone thinks otherwise.
G26, Ruger LCP
Ruger 10/22, Wyndham AR-15 5.56x45
Savage 111 LWH .270 Win.
Without the 2nd Amendment, none of the others would exist.