I think that "right to bear arms" in the second amendment implies ammunition too.
It sure as hell does not. Arms are arms, and ammunition is essentially a totally separate issue. Munitions can be nuclear projectiles, missiles, rockets, and the like. Having the contraption that expels or arms such munitions, without the munitions, would basically render the arms useless (except if you use them as blunt objects).
Another thing that I have often thought about-if the 2nd Amendment applies to militias for the purpose of protecting itself against the government, then what about the current situation where the federal government arms and trains the National Guard? States can call upon the NG, but they no longer arm/train them.
It appears that the 2nd Amendment (according to the "militia" interpretation) needs to be updated.
It does not specifically refer to the militia as a citizen army established with the aim of countering government military power in times of injustice. That is more of an assumption than reality.