My M29-10 Classic is a square butt, so it wouldn't surprise me if the M19 was SB as well.

That said, this is a reissue of one of the most common revolvers ever made. Surely they could have done something interesting like a 2", 2.5", 3", or 5" barrel.

With the current craze for 3" guns, it is incomprehensible that they would "introduce" a gun and not offer a 3" barrel. Yes, I saw the 3" PC M19, but that is a staggeringly hideous gun.