Heck, let's go the whole hog!
1) The Katyusha version mentioned earlier.
2) Sturm-Katyusha - drop the turret, add several RL-20s and fill gaps with RL-10s
3) The JagdScorpion - drop turret, fit RAC-2 with 2 tons ammo. (Would have loved to fit an LB-10X, but ... didn't work.)
4) The Scorpion BMP-1, with LAC/2 in turret, limited amphibious, and 3-ton infantry bay
(or the BMP-2 version, with LRM-5 & SRM-2 in turret, ton ammo each, same amphib & troop capacity)
5) Rename the LAC version "Wirlbewind"
Und so weiter O0