the ONLY Handi rifle I have at the present time is a .357 Magnum w/green/light wood laminate stock. It has a commemorative circle button of some sort [?] in the side of the buttstock. Limited Edition or something [I'm too lazy to walk to the gun safe].
Last year I grabbed several boxes of 38 Spl and .357 Mag ammo I somehow accumulated over the years and enjoyed hours at a friend's range. I have a Leupold 2.5-8X matte on it now. I may put a fixed Leupold M8 4X compact on it later.
I have so far fought off the urge to borrow a buddy's .357 Maximum reamer but who knows? This rifle shoots great as is so I may leave it alone and just SHOOT IT.
I DO believe it IS a great candidate for a threaded suppressor. I saw a neat little 'like' rifle here on this website that had this done to it. No [none?] great loss of velocity if the barrel is cut back to just over 16", after all it IS only a .357 Mag which usually lives in 4 and 6" barrel pistols!. And SO MUCH 'subsonic' ammo readily and cheaply available - .38 Spl ammo must be the most common centerfire ammo around, most of it subsonic.
OH,,,,and YES,,I would love to put a thumbhole Ultra buttstock on the rifle to make scope use a bit easier and more comfortable [higher comb].
Anyway, reading this makes me want to go grab the Handi and play with it. If the cost of the Fed Tax stamp weren't so high [$200] and then the suppressor cost, well,,,,,I'd be setting up the lathe NOW!