Submachine Gun, Cal. .45, M1928A1, Thompson
Submachine Gun, Cal. .45, M1/M1A1 Thompson
The M1928A1 "Tommy Gun", a delayed blowback
submachine gun, was issued to armored and reconnaissance units.
It was selective for semi- or fully-automatic fire. It fired a
.45 cal. cartridge in 20- or 30-round magazines, or a 50-round
drum. It had a leaf with aperture notch battle sight. It's rate
of fire was 600-725 spm. The M1928A1 had a removable buttstock.
Most had a horizontal fore grip, but some had a vertical fore
grip. The M1928A1 was relatively heavy, and expensive in use of
materials, machine time, and machine tools.
Submachine Gun, Cal. .45, M1/M1A1
Thompson was a blowback submachine gun.
It was selective for semi- or fully-automatic fire. It
fired a .45 cal. cartridge in 20- or 30-round magazines.
It's rate of fire was 700 spm. The gun was reliable, and
continued to operate when similar weapons would have failed
due to exposure to battle-field conditions (354,000).
- M1 Thompson was a redesign of the model M1928A1
to simplify production. The M1 had a permanently attached
buttstock and a spring-loaded firing pin like the M1928A1.
The M1 would not accept the M1928A1 drum type magazine.
The M1 had a simple fixed aperture rear sight.
- M1A1 differed from the M1 only in having the firing
pin machined into the face of the bolt.
Sources and Resources
Maintained by Robert Sherman
Originally created by John Pike
Updated Saturday, August 07, 1999 6:35:42 AM