April Fools - S8-E25
Continuity mistake: As Potter asks Hawkeye about stopping the jokes, his hand is up by Hawkeye's shoulder. After the angle changes, his hand is around waist height.
April Fools - S8-E25
Continuity mistake: In Potter's office, after Potter gives his orders, and checks Hawkeye, his hand is up. A second later it's down.
April Fools - S8-E25
Continuity mistake: When Sgt. Rizzo comes out from under the jeep, in the closeup his cigar is in his mouth. After the cut, the cigar is in his hand.
Answer: Even an Army field hospital would have SOME weapons for self-defense if the enemy attacked. What's meant is that it's not a combat outfit, and therefore wouldn't have enough weapons to actually attack anyone. (It's also mentioned a few times that the Officer of the Watch is supposed to carry a pistol at all times, but Hawkeye refuses to do it when he's in charge and Colonels Blake and Potter don't enforce the rule).
Captain Defenestrator