The following weapons are featured in the film Seven Days in May:
Seven Days in May is a 1964 thriller/drama film directed by John Frankenheimer and starring Kirk Douglas as USMC Colonel Martin "Jiggs" Casey, who uncovers a plot led by General James Mattoon Scott (Burt Lancaster) to overthrow the President of the United States (Fredric March).
When White House aide Paul Girard (Martin Balsam) goes to visit Admiral Barnswell at the U.S 6th Fleet in Gibraltar, he passes by a Marine guard with a M1 Garand rifle.
M16/SP1 Rifle
U.S Army soldiers at "Site Y" are armed with M16 rifles, which is likely the earliest appearance of the weapon in any Hollywood film. Colonel William 'Mutt' Henderson (Andrew Duggan) seizes a M16 from another soldier while helping Senator Raymond Clark (Edmond O'Brien) escape detention.
Browning M1919A4 Machine Gun
Tracked vehicles patrolling "Site Y" are fitted with Browning M1919A4 machine guns. Colonel Henderson orders a soldier at gunpoint to unload the cartridge belt from his Browning M1919A4 while helping Clark to escape.