Irwin-Pedersen M1 Carbine
Irwin-Pedersen Arms Company · Carbine · Out Of Production · 1942
Also known as: I-P M1 Carbine, Irwin Pedersen .30 Carbine
Overview
The Irwin-Pedersen M1 Carbine was the product of the Irwin-Pedersen Arms Company of Grand Rapids, Michigan, a prime contractor for the U.S. M1 Carbine. Plagued by tooling, quality, and management problems, Irwin-Pedersen assembled roughly 3,542 carbines but never had a single gun accepted by the U.S. government; in March 1943 its contract was cancelled and its plant handed to Saginaw Steering Gear. Saginaw later reworked many of the rejected Irwin-Pedersen guns and parts, accepting them under the 'S'G'' marking. Genuine Irwin-Pedersen-marked carbines are extremely rare. Mechanically it is a standard gas-operated, short-stroke piston semi-automatic in .30 Carbine.
Specifications
| Weight (empty) | 2480 g (87.5 oz) |
| Weight (loaded) | 2770 g (97.7 oz) |
| Overall Length | 905 mm (35.63") |
| Barrel Length | 458 mm (18.03") |
| Height | 120 mm (4.72") |
| Width | 32 mm (1.26") |
| Action Type | Gas Operated Short Stroke |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Magazine Capacity | 15 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 607 m/s (1991 fps) |
| Muzzle Energy | 1311 J (967 ft·lbf) |
| Effective Range | 275 m (301 yd) |
| Maximum Range | 1829 m (2000 yd) |
| Rate of Fire | 40 rpm |
| Barrel Rifling | Right Hand |
| Rifling Twist | 508 mm (20.00") |
| Number of Grooves | 4 |
| Frame Material | Steel |
| Barrel Material | Steel |
| Stock Material | Wood |
| Finish | Parkerized |
Calibers
- .30 Carbine · primary — also known as 7.62x33mm, .30 M1 Carbine
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Cross Bolt Push Button Safety
- Features: Short Stroke Gas Piston, Rotating Bolt, Detachable Box Magazine, Lightweight Design, Adjustable Rear Sight, Blade Front Sight, Bayonet Lug, Sling Swivels
Base model
Service history
Operators
- United States Army · as Carbine, Caliber .30, M1
Conflicts
- World War II (1942-1945)
Production
Estimated total produced: 3,542 · Production years: 1942-1943
Approximately 3,542 assembled; none accepted by the government before contract cancellation; many later reworked by Saginaw
Origin
Country of origin: United States
Designer: Frederick Humeston / William Roemer (Winchester)
Discontinued: 1943
Notes
Irwin-Pedersen failed to qualify a single accepted carbine; the contract was cancelled and the Grand Rapids plant taken over by Saginaw, which reworked the rejected guns under the 'S'G'' marking. True I-P-marked receivers are rare collector items.
Background
Irwin-Pedersen became the cautionary tale of WWII carbine production: it could not qualify a single acceptable gun before being shut down and replaced by Saginaw at the same Grand Rapids plant.