Size of the bullet
The Mitsubishi A6M Zero had two 20 mm cannon and two 7.7 mm (.303 in) machine guns .
First there a UK cubits, long cubits, greek cubits, etc. Now, 1 Greek cubit computes to about 462.788 mm.
Both the interceptor and fighter-bomber versions of the F-86 Sabre carried six 12.7 mm M3 Browning Machine Guns
spitfire: 8 fixed wing mounted 0.303 Browning Machine guns hurricane: 8*mg 7.7 mm Focke-Wulf: two fuselage-mounted 7.92 mm (.312 in) MG 17s, two wingroot-mounted 7.92 mm (.312 in) MG 17s and two outboard wing-mounted 20 mm MG FF /MS. MG= machine gun.
it mean's a person that makes guns
mm means millimeters in measurements
These are abbreviations for units of metric measurement; 'm' stands for 'metres', and 'mm' stands for 'millimetres'.
mm
The precise measurement is 5.7 mm for the first value and 3.6 m for the second value.
6 mm is a measurement standing for six millimeters.
mm
10
Which aircraft? In WWII armament ranged from zero (trainers, etc) to rifle-calibre machine guns, heavy machine guns, cannons (15 mm upwards), heavy guns (57 mm, 75 mm, 105 mm), rockets, torpedoes, bombs, mines...
The Mitsubishi A6M Zero had two 20 mm cannon and two 7.7 mm (.303 in) machine guns .
30 mm Is The Largest
634 mm.
By unit of length and distance and conversion ,we can say that 1 cm=0.01 m =10 mm