Yeah, the IS Std would certainly work better than the Fenrir off the RATs for sure. But they do build the IS Std, Infiltrator & Purifier- the latter two admittedly in small quantities- along with two mechs at the secret HDF Manufacturing complex. Considering the mercs that guard the place were fitted out with what is produced to defend it . . . Banshees, UrbanMechs and BA to supplement the mech companies gets interesting.