The Guns of Navarone

Sten Mk II

Several of the commandos bring Stens with them, and use them often against German soldiers. Andrea Stavros (Anthony Quinn) uses a Sten gun at the beginnig of the film when a German patrol boat arrives at the patrol boat. He kills several Germans with it who climb aboard his boat and also kills several Germans with the same gun in the end gunbattle. Spyros Pappadimos (James Darren) kills several Germans and then confronts their officer (who also has a Sten gun. How the officer got one is unknown) with the Sten.

scoped Mosin Nagant

Andrea carries a Mosin-Nagant sniper rifle, and kills four Germans with it when they climb the hill. After that, he never fires it again but is seen holding it several times.

Bren

On the fishing boat, Pappadimos keeps a Bren gun hidden under a blanket when the German patrol boat arrives. When the Germans discover who they are, Pappadimos whips out the Bren and guns down several soldiers. The Bren is never seen after that.

Mauser M1934

Keith Mallory (Gregory Peck) takes a Mauser M1934 from the body of a dead German officer in the middle of the movie and uses it as his sidearm for the rest of the film. He attatches a silencer to it and kills two Germans with it so that he and John Miller (David Niven) can pass safely to the guns.

Most German officers carry Mauser M1934s as their sidearms in the film as well.

Beretta M1934

Pappadimos's sidearm is a Beretta M1934 when he always uses with a silencer attatched. In the end gunbattle, he gives the Beretta to his sister, Maria so that she can be armed in the end gunbattle.

Smith and Wesson M1917

The commandos bring Smith and Wesson M1917s as their sidearms. Roy Franklin (Anthony Quayle) attempts to commit suicide with one but is stopped from Mallory.

Webley Mk IV

In the beginning of the film, when Mallory recruits Stavros, he carries a Webley in a shoulder holster and draws it when Mallory arrives, but then puts the gun away.

MP40

The common weapon of the German Army in the film is the MP40, which is unrealistic in most films.

Mauser K98K

Some Germans use Mauser rifles, but the MP40 is far more common in the film.