It’s not just the stock.
The roughtecs are generally stainless and cerakoted with a D18 profile barrel versus the standard D16 lite and stainless lite. They also come threaded but with too long of barrel lengths for my liking if planning to suppress.
In my opinion, for a hunting gun, the D16 barrel at 20” unsupressed and/or cut to 16” or 18” suppressed is just right for field carry and shooting balance.
The D18 with a suppressor is very nose heavy and should be cut to 16” or 18” for field carry.
I’d buy a stainless or blued lite, cut it to 16”, suppress it, and shoot and hunt the piss out of it until you wear abijt the barrel.
I know you mentioned re-barrel, sorry if it missed it, what was the chambering of the gun you plan to buy?