The following guns were used in the film The Dirty Dozen:
As I add screencaps, I ask anyone who knows the characters please help me since I've seen the movie twice and even made a name list and descriptions but still can't figure out all their names. Thanks. - Gunmaster45
The most commonly seen gun in the film is the older M3 "Grease Gun". It is not an M3A1 model because the guns clearly hav external charging handles on the right side while the M3A1 as divots in the bolt so the bolt can be pinched and pulled back. They also have a much higher rate of fire than the M3A1 model. Prison Military and Police (M&P) guards are seen using them, as well as practically every member of the Dirty Dozen, most notabley Major Reisman (Lee Marvin) during several scenes in basic training. In reality, the Grease Gun was never fielded in such great numbers but was likley the easiest gun for the film armorers to aquire.
M1 Garand
While the M1 Garand was the most heavily fielded weapon of the U.S. Military during WWII, it is seen somewhat scarcely in the film, mainly in the hands of M&Ps and some of the members of the Dirty Dozen during the war games.
M1 Carbine
Several of Col. Breed's (Robert Ryan) men are seen armed with M1 Carbines, although they are only in the background.
When Reisman's men dissarm Breed's men, one of them is seen armed with a paratrooper folding stock M1A1 Carbine.
M1911A1
Several M&P officers and Major Reisman (Lee Marvin) are seen with M1911A1 pistols as their sidearms.
Browning M1919A4
Several times the Browning M1919A4 is used in the film. First it is seen carried in a jeep by the blue team during the war games. Two are used during the assault on the mansion, one used by (??? and ???) near the front entrance and the other manned by Tassos Bravos (Al Mancini) to combat the approaching German vehicles.
Mk 2 hand grenade
Several members of the Dirty Dozen keep Mk 2 hand grenades hanging on their belts, most notabley Robert Jefferson (Jim Brown) and Archer Maggott (Telly Savalas). While on the roof, Seth Sawyer (Colin Maitland) gets stuck after having a leg break through the roof on his way to disable the alarm tower. Immobilized, he throws two Mk 2 grenades at the tower to destroy it instead. When preparing to blow up the mansion, Major Reisman (Lee Marvin) and his men dump bags of Mk 2 grenades down the vents and then dump gasoline to make the building itself a bomb.