The Katana CRK-5006-1 uses IJJs to give itself a 3/5/5 movement profile, swaps the autocannon out for a Gauss Rifle, upgrades the SRM pods to streaks, and swaps out the large and small lasers in the arms for a Light PPC and an ER Medium laser. Armor's still on the thin side like the original Katana, but at least it's got double heatsinks and CASE II protecting the side torsos where the Gauss Rifle and SSRM ammo is located.