Colt's · Pistol
Colt Model 1903 Hammerless
Blowback (semi-automatic) · .32 ACP · introduced 1903
Also known as Colt Pocket Hammerless, Colt Model M, Colt 1903 Pocket Hammerless
About the Colt Model 1903 Hammerless
The Colt Model 1903 Hammerless is a blowback-operated, single-action semi-automatic pocket pistol chambered in .32 ACP, designed by John Moses Browning and produced by Colt from 1903 to 1945. Despite its 'Hammerless' name, the pistol uses an internal hammer concealed beneath the rear of the slide, giving it a sleek, snag-free profile ideal for concealed carry. With over 570,000 produced, it became a favorite of the OSS, FBI, and U.S. Army general officers, who were issued examples roll-stamped 'U.S. PROPERTY' during World War II.
Known as the pistol of generals and spies, the Colt 1903 was carried by Eisenhower, Patton, and FDR, and remained a discreet sidearm of choice for OSS and intelligence operatives through World War II.
Colt Model 1903 Hammerless specifications
General
- Type
- Pistol
- Action
- Blowback (semi-automatic)
- Firing mechanism
- Hammer-fired
- Trigger
- Single action
- Calibres
- .32 ACP
- Magazine capacity
- 8 rounds
- Magazine
- Detachable box magazine
Dimensions
- Barrel length
- 95 mm (3.7 in)
- Overall length
- 171 mm (6.7 in)
- Height
- 114 mm (4.5 in)
- Width
- 25 mm (1.0 in)
- Weight (empty)
- 0.68 kg (1.50 lb)
- Weight (loaded)
- 0.74 kg (1.63 lb)
- Sight radius
- 140 mm (5.5 in)
Barrel
- Rifling
- Right hand
- Grooves
- 6
Materials
- Barrel
- Steel
- Receiver / frame
- Steel
- Slide
- Steel
- Stock
- Walnut
- Finish
- blued
Performance
- Muzzle velocity (typical)
- 270 m/s (886 fps)
- Muzzle energy (typical)
- 168 J (124 ft·lb)
- Effective range
- 25 m
History
- Introduced
- 1903
- Discontinued
- 1945
- Production status
- Discontinued
- Country of origin
- US
- Designer
- John Moses Browning
Features
- Concealed hammer
- Snag free profile
- Fixed sights
- Internal hammer
Safety
- Grip safety
- Manual safety
- Magazine disconnect
Issued as the U.S. Army General Officers pistol from the 1940s until replacement by the M15 in the 1970s; recipients included Eisenhower, Bradley, Marshall, and Patton. President Franklin D. Roosevelt also carried one. The companion Model 1908 chambered the larger .380 ACP cartridge.
Similar models
Acha Hermanos Looking Glass
Blowback (semi-automatic) · .32 ACP

Colt .38 Super Model O
Short recoil (semi-automatic) · .38 Super

Colt .380 Government
Short recoil (semi-automatic) · .380 ACP

Colt .380 Mustang Pocketlite
Short recoil (semi-automatic) · .380 ACP
Colt .380 Mustang XSP
Short recoil (semi-automatic) · .380 ACP

Colt 1860 Army
Revolving · .44 Caliber Percussion

Colt 1878 Frontier
Revolving · .45 Colt
Colt 1903
Short recoil (semi-automatic) · .32 ACP