SGII: SLAM

I noticed that on p. 29 of SGII, in the listings of vehicle-mounted
weapons, there is no reference to SLAM (Salvo LAunched Missile packs)
systems, unlike DSII.  It seems like SLAMs would be very useful against
infantry.  How about giving them a Base Impact Value of D10, and an
Impact Value multiplier of double the size class (thus making them not
quite as effective as DFFGs)?