Browning M1919A4
Browning Arms Company · Machine Gun · Discontinued · 1936
Also known as: M1919, Thirty Cal, .30 Cal Browning, Light Thirty, Browning Automatic Machine Gun, Caliber .30, M1919A4
Overview
The Browning M1919A4 is an American .30 caliber air-cooled, recoil-operated, belt-fed medium machine gun developed by John Moses Browning and adopted by the United States military on September 5, 1935. Chambered in .30-06 Springfield, the M1919A4 was the definitive and most widely produced variant of the M1919 series, evolved from the water-cooled M1917 heavy machine gun to offer a lighter, more mobile weapon suited to modern mechanized warfare. With a 24-inch (610mm) barrel enclosed in a perforated steel cooling jacket and an empty weight of approximately 14 kg (31 lbs), the M1919A4 was typically mounted on the 6.4 kg (14 lb) low-slung M2 tripod, giving infantry a crew-served medium machine gun capable of sustained fire out to 1,000 meters. Its cyclic rate of 400-550 rounds per minute, combined with the powerful .30-06 cartridge delivering a muzzle velocity of approximately 860 m/s, made it the backbone of U.S. infantry squad and platoon firepower throughout World War II and the Korean War. The M1919A4 was mounted on nearly every platform the U.S. fielded, from jeeps and half-tracks to tanks, aircraft, and landing craft, and was issued to virtually every Allied nation under Lend-Lease. Production during WWII reached approximately 390,000 units, with the Saginaw Steering Gear Division of General Motors producing the lion's share at 350,951 units between 1942 and 1945, along with Rock Island Arsenal and Buffalo Arms Co. supplying the balance. The weapon remained the U.S. military's standard medium machine gun until 1957, when it was superseded by the M60, though the M37 tank variant and the AN/M2 aircraft variant continued in service for years afterward. Many NATO allies rechambered surplus M1919A4s to 7.62x51mm NATO, and examples of these conversions, such as the Canadian C1/C5 and Israeli variants, remained in frontline service into the 1990s.
Specifications
| Weight (empty) | 14060 g (496.0 oz) |
| Overall Length | 1041 mm (40.98") |
| Barrel Length | 610 mm (24.02") |
| Sight Radius | 354 mm (13.94") |
| Action Type | Recoil Operated |
| Firing Mechanism | Closed Bolt |
| Trigger Type | Single Stage |
| Magazine Capacity | 250 rounds |
| Magazine Type | Belt |
| Muzzle Velocity | 860 m/s (2822 fps) |
| Muzzle Energy | 3600 J (2655 ft·lbf) |
| Effective Range | 1000 m (1094 yd) |
| Maximum Range | 1370 m (1498 yd) |
| Rate of Fire | 500 rpm |
| Barrel Rifling | Right Hand |
| Rifling Twist | 254 mm (10.00") |
| Number of Grooves | 4 |
| Frame Material | Steel |
| Barrel Material | Steel |
| Stock Material | Wood |
| Finish | Parkerized |
Calibers
- .30-06 Springfield · primary — also known as .30-06, 7.62x63mm, .30 Gov't '06, Caliber .30 M1906
Features
- Firing modes: Full Automatic
- Feed systems: Fabric Belt, Disintegrating Link Belt
- Safety mechanisms: Manual Safety, Closed Bolt System
- Features: Air Cooled, Perforated Barrel Jacket, Short Recoil Operated, Belt Fed, Tripod Mounted, Pistol Grip, Spade Grip Option, Quick Change Barrel, Iron Sights, Dual Role Mount, Vehicle Mountable, Coaxial Mountable
Variants
- M1919A1 — Early Variant
- M1919A2 — Cavalry Variant
- M1919A3 — Infantry Variant
- M1919A5 — Tank Variant
- M1919A6 — Infantry Lmg Variant
- AN/M2 — Aircraft Variant
- M37 — Tank Coaxial Variant
- C1/C5 — Canadian 762nato Variant
- L3A1/L3A2 — Australian Variant
- Ksp m/42 — Swedish Variant
Service history
Operators
- United States Army · adopted 1936 · as M1919A4
- United States Marine Corps · adopted 1936 · as M1919A4
- United States Navy · adopted 1936 · as M1919A4
- British Armed Forces · adopted 1940 · as M1919A4
- Canadian Armed Forces · adopted 1940 · as C1/C5
- Australian Defence Force · as L3A1/L3A2
- Israel Defense Forces · adopted 1948 · as M1919A4
- Republic of Korea Armed Forces · adopted 1950 · as M1919A4
- Army of the Republic of Vietnam · adopted 1955 · as M1919A4
- Swedish Armed Forces · adopted 1942 · as Ksp m/42
- French Armed Forces · adopted 1944 · as M1919A4
- Philippine Armed Forces · as M1919A4
- Republic of China Armed Forces · as M1919A4
- Nationalist Chinese Forces · adopted 1941 · as M1919A4
- Norwegian Armed Forces · as M1919A4
- Danish Armed Forces · as M1919A4
- Greek Armed Forces · as M1919A4
- Brazilian Armed Forces · as M1919A4
Conflicts
- World War II (1939-1945)
- Chinese Civil War (1927-1949)
- Korean War (1950-1953)
- 1948 Arab-Israeli War (1948-1949)
- First Indochina War (1946-1954)
- Vietnam War (1955-1975)
- Suez Crisis (1956)
- Six-Day War (1967)
- Yom Kippur War (1973)
- Rhodesian Bush War (1964-1979)
Production
Estimated total produced: 438,971 · Production years: 1919-1945
Approximately 390,000 M1919A4 units produced during WWII, with Saginaw Steering Gear Division of General Motors producing 350,951 units (1942-1945), Buffalo Arms Co. producing 38,800 units (1942-1943), and the remainder from Rock Island Arsenal. Total M1919 family production across all variants exceeds several million when including post-war foreign license production. BSA produced variants in the UK.
Origin
Country of origin: United States
Designer: John Moses Browning
Discontinued: 1957
Notes
The M1919A4 is the most numerous and widely exported variant of the M1919 series. It uses a short-recoil action with a vertically moving locking block, firing from a closed bolt, which gives it excellent first-round accuracy when used in the indirect fire role from a tripod. Unlike the later German MG42, the M1919A4 does not have a quick-change barrel in the modern sense - barrel changes require tools and are significantly slower, limiting sustained fire compared to contemporary general-purpose machine guns. The fabric belt used early in its service life was replaced by metallic disintegrating M1 links in WWII-era production. The M1919A6 variant, introduced in 1943, added a shoulder stock, bipod, carrying handle, and lighter barrel in an attempt to create a squad light machine gun, but at 14.7 kg remained heavier than most true LMGs of the era. Post-war 7.62x51mm NATO conversions were common - Canada's C1/C5, Israel's IDF conversions, and Rhodesia's variants all extended the platform's service life. The AN/M2 aircraft variant featured a much lighter receiver and an extremely high 1,200-1,500 rpm cyclic rate for aerial gunnery. Despite being superseded by the M60, the M1919 design's reliability, simplicity, and sheer numbers have kept it in irregular service around the world well into the 21st century.
Background
The M1919A4 traces its lineage directly to John Moses Browning's water-cooled M1917, which he demonstrated to the U.S. Army in 1917 by firing 20,000 rounds continuously without a malfunction. By stripping away the heavy water jacket and replacing it with a perforated air-cooling shroud, the U.S. Army got a weapon light enough for a rifle squad yet durable enough to arm tanks, jeeps, and fighter aircraft. The 'Thirty Cal' became so ubiquitous on the WWII battlefield that American GIs nicknamed any U.S. crew-served gun a 'thirty,' and decades later, 7.62 NATO conversions of the same guns were still being carried into battle by Israeli paratroopers in the Six-Day War and Canadian soldiers well into the 1980s.