The Sniper - S2-E10
Revealing mistake: When the bottle of liquor is shot, there's no bullet hole in the basket that's right behind it, nor does the basket move from the impact.
L.I.P. (Local Indigenous Personnel) - S2-E7
Continuity mistake: The C.I.D man's hat goes from straight to crooked between cuts in the swamp as he tries to leave.
Continuity mistake: Frank comes over to talk to Hawkeye and Trapper. His arms go from down by his sides to hands on hips between angles.
The Abduction of Margaret Houlihan - S5-E6
Continuity mistake: In Potter's office, after BJ and Hawkeye finish their lines Hawkeye starts to play with his yo yo. After the angle change he starts with his yo yo again.
Dear Peggy - S4-E10
Character mistake: When he sees the 'P' for Protestant on Davis' chart, Col. Hollister states "A lot of your Davises are 'J's, you know" implying that Davis is a Jewish name. In fact, the ID tag code for Jewish faith was 'H' for Hebrew. (00:18:45)
Continuity mistake: When Mr's Li first threatens Klinger with a pitchfork in his office, it has four tines. A close up shows a completely different five tine fork. Then back to the first one.
Other mistake: When Trapper and Hawkeye are driving along, you can see two points of light on the steering wheel. The lights are from from the filming illumination panels.
As You Were - S2-E20
Revealing mistake: As Henry goes over to the expectant mother, a round takes out the generator. After the lights go out, there is a blue light outside the window, and also blue lights over the action. They can be seen in the reflections on the light sets over the tables.
Visible crew/equipment: In the swamp, behind the General, you see a hole in the tent that disappears a second later. In that second, you see a boom mike.
Continuity mistake: The crew is getting the bad news in Henry's office when Radar reports more choppers. From behind, Henry starts to react, and when the angle changes he reacts again.
Continuity mistake: When "Ralph" has Hawkeye and BJ at gunpoint, saving their lives, the scenery behind them changes several times. Sometimes there's the road and a few trees. Then there's no road and a lot more trees and shrubbery.
They Call the Wind Korea - S7-E7
Continuity mistake: When Klinger is coming over the hill at the end of the episode, the camera shows him in the outdoor setting, and the spot he's on has sparse vegetation. When the camera goes to a close up of him, the trees and shrubs are thicker and closer to him. This alternates a couple of times.
Dear Peggy - S4-E10
Audio problem: As Hawkeye calls for X-rays, you can see Klinger hollering a reply through the door, but nothing is heard. (00:21:30)
Continuity mistake: When BJ is letting Hawkeye in on the fact the he was the only real victim of the gag, he's putting a forkful of eggs in his mouth. After the camera cuts to Margaret and back, he doing it again. His mouth was empty both times.
Other mistake: When Trapper and Hawkeye make the right turn after Trapper tries to use the restroom, you see that Trapper avoids the left side of the road just after the turn. This is to avoid the explosive charge set in the ground used to simulate a mortar round exploding.
Continuity mistake: When Mulcahy is describing a person who was "quite a Bozo" to Potter, Potter realizes who he is referring to. Mulcahy's arm is close to the table. When the camera cuts to Mulcahy's face, his mug is close to his face.
Continuity mistake: When Potter is chewing out Klinger about the morning reports, the camera is looking at Potter. As he finishes his line with "once in a while", he puts his right arm down. When the camera cuts to look at Klinger from behind Potter, his (Potter's) arm is up and finger pointing at Klinger.
Continuity mistake: When the bomb disposal sergeant is sitting down at the end of the episode, he's facing the table. When the camera cuts in closer, his left shoulder is facing the table.
Continuity mistake: When BJ and Hawkeye are arguing while trying to eat, Winchester starts his French Horn. When the camera is behind BJ, he puts down his fork. When the camera cuts to a front shot of BJ, he's holding the fork he just put down. Then the camera cuts to look at Hawkeye, BJ's fork is down again.
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