The Dirty Dozen (1967)

M3 Grease Gun

The primary weapon of Major Reisman (Lee Marvin), the prison guards and the "Dozen" themselves. Also seen being carried by members of the 101st under Colonel Green.

(note the charging handle on Jim Brown's weapon indicating it is an M3 as opposed to an M3A1)

M1 Garand

Carried by various members of the "Dozen" during the movie, especially Telly Savallas as Maggot while on guard duty the night of the party, and by various unit members during the war games and, of course, by Colonel Green's men.

M1 Carbine

Though not used by any members of the "Dozen" it is seen being carried by various members of Colonel Green's unit especially during the attempted takeover of the "Dozen's" camp.

Browning M1919

Seen being used by the "Dozen" during the war games and during the raid on the chateau.

MG42

Used by Clint Walker while supporting the main assault on the chateau. The weapon in the movie appears to have been supplied with a 50 round drum magazine.

Karabiner 98k

Standard German infantry rifle of the war. Used by the chateau's guards during the attack. One guard has a sniper scope on his weapon which (when the camera cuts to a "through the scope view") seems to have an infra-red capability (a red view) which is unlikely since such a scope (at that date) would have been extremely bulky and heavy.

File:Kar98 sniper.jpg

MP40

The ubiquitous German SMG of the war. Seen in the hands of the chateau's guards throughout the final attack.

Walther P38

Carried by Lee Marvin's and Charles Bronson's characters as well as by various Germans in the film. Used by Marvin and Bronson to take out various guards as well as personnel in the chateau's bunker.

Mk 2 hand grenade

Carried by members of the "Dozen" during the attack. Plays an especially prominent role in the finale when sacks of them are dumped down the ventilation pipes (along with gasoline) and are detonated by Jim Brown one after the other.