Owen Machine Carbine Mk I
John Lysaght (Australia) Ltd, Port Kembla · Submachine Gun · Out Of Production · 1942
Also known as: Owen Gun, Owen MC Mk 1, Digger's Darling
Overview
The Owen Machine Carbine Mk I was an Australian-designed submachine gun developed by Evelyn Ernest Owen and adopted by the Australian Army in 1942. Distinguished by its top-mounted 33-round magazine, offset iron sights, and a separate compartment isolating the bolt from the receiver, the Owen earned a legendary reputation in the South West Pacific theatre for unmatched reliability in mud, sand, and jungle conditions. Roughly 50,000 were manufactured by John Lysaght's Port Kembla works between 1942 and 1945.
Specifications
| Weight (empty) | 4210 g (148.5 oz) |
| Weight (loaded) | 4720 g (166.5 oz) |
| Overall Length | 806 mm (31.73") |
| Barrel Length | 247 mm (9.72") |
| Height | 254 mm (10.00") |
| Action Type | Blowback |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Magazine Capacity | 33 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 421 m/s (1381 fps) |
| Muzzle Energy | 660 J (487 ft·lbf) |
| Effective Range | 120 m (131 yd) |
| Maximum Range | 200 m (219 yd) |
| Rate of Fire | 700 rpm |
| Barrel Rifling | Right Hand |
| Number of Grooves | 6 |
| Frame Material | Steel |
| Barrel Material | Steel |
| Stock Material | Wood |
| Finish | Blued |
Calibers
- 9x19mm Parabellum · primary · 9mm NATO — also known as 9mm Luger, 9mm NATO, 9x19mm
Features
- Firing modes: Semi Automatic, Full Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety, Isolated Bolt Chamber
- Features: Open Bolt, Top Mounted Magazine, Offset Iron Sights, Quick Change Barrel, Separate Bolt Compartment, Fixed Wooden Stock, Vertical Foregrip, Bayonet Lug
Variants
- Owen Mk 1/42 — Early Production
- Owen Mk 1/43 (Wood Butt) — Production Model
- Owen Mk 2 — Experimental
Service history
Operators
- Australian Army · adopted 1942 · as Owen Machine Carbine Mk 1
- New Zealand Army · adopted 1944
- British Army (Pacific theatre) · adopted 1943
- Royal Australian Air Force · adopted 1942
Conflicts
- World War II (1942-1945)
- Korean War (1950-1953)
- Malayan Emergency (1948-1960)
- Vietnam War (1962-1972)
Production
Estimated total produced: 50,000 · Production years: 1942-1945
Approximately 50,000 manufactured by John Lysaght's at Port Kembla and Newcastle during World War II. The Owen remained in Australian service for over 20 years, finally retired in favour of the F1 SMG in 1963.
Origin
Country of origin: Australia
Designer: Evelyn Ernest Owen
Discontinued: 1945
Notes
Sometimes called the 'Digger's Darling' by Australian troops. The top-mounted magazine combined with offset sights allowed soldiers to fire from the prone position with a low silhouette. The bolt was housed in a sealed compartment separated from the chamber by a small bulkhead, preventing dirt ingress through the cocking-handle slot - a key reason for its legendary reliability in jungle warfare. Remained in Australian service through Korea and Vietnam before being replaced by the F1 SMG in 1963.
Background
Evelyn Owen was a 24-year-old self-taught tinkerer who designed the gun as a teenager and demonstrated it in his backyard in 1939; the Australian Army initially rejected it, but his neighbour - a Lysaght's executive - championed it through trials where it ran flawlessly while a Thompson and a Sten choked on mud. Soldiers in New Guinea regularly buried Owens in mud or dunked them in rivers as test demonstrations.