They are weapons, but are they 'arms'.
arm2 Audio pronunciation of "arms" ( P ) Pronunciation Key (ärm)
n.
1. A weapon, especially a firearm: troops bearing arms; ICBMs, bombs, and other nuclear arms.
2. A branch of a military force: infantry, armor, and other combat arms.
3. arms
1. Warfare: a call to arms against the invaders.
2. Military service: several million volunteers under arms; the profession of arms.
4. arms
1. Heraldry. Bearings.
2. Insignia, as of a state, an official, a family, or an organization
Don't think they fit under the current definitions.