The firearms seen in the 1970 film No Blade Of Grass include the following...
L1A1 Self Loading Rifle
British Inch Pattern L1A1 SLR (Self Loading Rifle) chambered in 7.62 Nato - Variation of the FN FAL rifle. British & New Zealand SLR's were later fitted with black fibreglass furniture as seen here.
FN FAL
FN FAL 50.00 7.62x51mm NATO
Sterling L2A3 submachine gun
Sterling Submachine Gun - 9mm
Walther P38
Walther P38 pistol (manufactured at the Mauser Factory) - World War Two dated - 9mm
Vickers machine gun
Lee-Enfield No.1 MkIII* rifle
Lee-Enfield No.1 Mk.III* - .303 British. This was the main battle rifle of British and Commonwealth forces during the First World War, introduced in 1907 it has seen action throughout the 20th century.