Since Heller has established that the 2nd Amendment does indeed protect an individual right to own firearms, now would be a good time to throw the whole militia clause back on the gun grabbers...
The first militia act (1792) explicitly stated that everyone mustering for militia duty must bring their own firearms & ammo, suitable for the common defense. This means that,
at the very least, all small arms (including ammo) suitable for the common defense are explicitly protected and individuals
must be allowed to "keep" them, on the off chance the 'reserve militia' (all males (citizens, in some states) capable of bearing arms who are not already in the active duty military, National or State Guards) is ever called upon for service...