Neat gun but pretty pricey for what it is. $1400+ (I've mostly seen them for over $2k) for a pistol caliber carbine. Compare it to a mech-tech glock unit or a keltec sub 2000, and it's a bit steep. You could buy it's bigger, beefier cousin, the HK 91 (now the PTR 91) for pretty much the same price. I would love to come across a "honey no" one for pretty cheap though.
As a side note, that girl needs to learn how to shoot. My 45 automatic handguns don't recoil that much.
A pistol round carbine is obsolete.