Italy
13.2 mm/75.7 (0.52") MG Model 1931
Updated 26 May 2012
Gas-operated, air-cooled machine-gun used on most Italian warships of World War II.  Also used on many submarines in a disappearing twin mount.  Manufactured by Breda.
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Gun Characteristics
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Designation 13.2 mm/75.7 (0.52") Model 1931
Ship Class Used On Many
Date Of Design 1931
Date In Service 1935
Gun Weight 104.5 lbs. (47.5 kg)
Gun Length oa N/A
Bore Length 39.4 in (1.000 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire 500 rounds per minute cyclic
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Ammunition
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Type Fixed
Weight of Complete Round 0.28 lbs. (0.125 kg)
Projectile Types and Weights Ball - 1.8 oz (0.051 kg)
Bursting Charge N/A
Projectile Length N/A - Complete round 5.4 in (13.7 cm)
Propellant Charge 0.54 oz (154 gm)
Muzzle Velocity 2,592 fps (790 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun 1,500 rounds
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Range
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Elevation With 1.8 oz (0.051 kg) Bullet
Range @ 45 degrees Maximum:  6,600 yards (6,000 m)
Effective:  2,200 yards (2,000 m)
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Mount / Turret Data
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Designation Single and twin mountings
Weight  Single:  N/A
Twin:  1,532 lbs. (695 kg)
Elevation Single:  -10 / +90 degrees
Twin:  -11 / +85 degrees
Elevation Rate Manually operated, only
Train 360 degrees
Train Rate Manually operated, only
Gun recoil N/A
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Data from
"The Italian Navigatori Class, 1926" article by Elio Andò in "Warship Special 2:  Super Destroyers" edited by Antony Preston
"Naval Weapons of World War Two" by John Campbell
"Italian Warships of World War II" by Aldo Fraccaroli
Page History

09 May 2006 - Benchmark
26 May 2012 - Updated to latest template