13.2 mm/76 (0.52") Model 1929
Updated 15 December 2013

A Hotchkiss design widely used as AA MG in twin and quadruple mountings on French warships of the 1930s and 1940s.

This weapon was intended to provide close-range defense against aircraft.  Like their counterparts in other nations, these small-caliber guns were incapable of defense against either torpedo-bomber or high-level bomber attacks as the bullets they fired were too light and too short ranged to be effective.  Ships refitted in Allied ports had these guns replaced with 20 mm Oerlikons.

This gun formed the basis for the Japanese 13 mm and 25 mm AA guns of World War II.


13.2 mm AA guns on unidentified Free French destroyer
IWM photograph A 2206


Twin 13.2 mm Hotchkiss MG now at the Exposition of Navy Museum, Gydnia
This weapon was used on the Polish minelayer ORP Gryf
Photograph copyrighted by Michal Kopacz


Sketch of Quad 13.2 mm Hotchkiss MG
Image courtesy of John Schaefer


Quad 13.2 mm Hotchkiss MG in production
Photograph courtesy of John Schaefer

Gun Characteristics
Designation 13.2 mm/76 (0.52") Model 1929
Ship Class Used On Most warships of 1930s - 1940s
Date Of Design about 1930
Date In Service about 1935
Gun Weight 66 lbs. (30 kg)
Gun Length oa N/A
Bore Length 39.5 in (1.003 m)
Rifling Length N/A
Grooves N/A
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire Cyclic - 450 rounds per minute
Practical - about 200 - 250 rounds per minute
Type Fixed
Weight of Complete Round 4.3 oz (122 g)
Projectile Types and Weights Bullet - 1.8 oz (51 g)
Bursting Charge Solid bullet
Projectile Length N/A
Propellant Charge N/A
Cartridge 0.51 x 3.9 in (13.2 x 99 mm)
Muzzle Velocity 2,592 - 2,625 fps (790 - 800 mps)
Working Pressure N/A
Approximate Barrel Life N/A
Ammunition stowage per gun Dunkerque:  About 3,000 rounds
Others:  N/A
Note:  Used a 30-round magazine.
Elevation With 1.8 oz (51 gm) Bullet
Range @ 45 degrees 7,850 yards (7,200 m)
AA Ceiling 13,780 feet (4,200 m)
Mount / Turret Data
Designation Twin Mounts:  CAD Mle 1929
Quad Mounts:  CAQ Mle 1929
Weight  Twin:  N/A
Quad:  1.14 tons (1.16 mt)
Elevation -10 / +90 degrees
Elevation Rate Manually operated, only
Train 360 degrees
Train Rate Manually operated, only
Gun recoil N/A
Note:  Single mounts were also contemplated, but apparently not put into production.
Data from
"Naval Weapons of World War Two" by John Campbell
"Battleships:  Allied Battleships in World War II" by W.H. Garzke, Jr. and R.O. Dulin, Jr.
"French Battleships:  1922 - 1956" by John Jordan and Robert Dumas
"Rapid Fire" by Anthony G. Williams
Page History

14 August 2008 - Benchmark
28 November 2009 - Added information on gun and mounting weights
15 December 2013 - Added photograph of guns on a Free French destroyer