Semi-auto or Auto

by
posted on January 11, 2012
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
wiley-clapp.jpg

A reader responded to a blog with his concerns over proper use of the terms “automatic” and “semi-automatic.” In terms of describing the type of action used in many magazine-fed firearms, automatic means continuous fire as long as the trigger is depressed and ammo is available in the gun. Semi-automatic means one shot for each trigger press and reset.

However, early literature uses automatic as describing a gun that not only fires when you press the trigger, but also reloads its own chamber. It came into common parlance in that sense around the time when we needed to differentiate between handguns with cylinders and those with magazines.

I see no reason why we shouldn't describe the Model 1911 as an automatic pistol. After all, it is chambered for the .45 ACP (Automatic Colt Pistol) cartridge, not the .45 SACP (Semi-Automatic Colt Pistol).

Latest

Cartridge Nomenclature
Cartridge Nomenclature

Deciphering (Mostly Nonsensical) Cartridge Nomenclature

If you’re perplexed by the naming practices used by our wildcatting forefathers and cartridge makers but are still curious about what they mean, read on.

The Armed Citizen® Jan. 19, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

"9 mm Optimized, But 10 mm Capable:" Dead Air's New RXD910Ti Suppressor

The new Dead Air RXD910Ti harnesses the technology of the patented Triskelion baffle system to make for a 9 mm-optimized silencer that is also capable for use with 10 mm pistol cartridges and more.

Revisiting A World War II Marine’s Story

Secretary of War Pete Hegseth, in his speech to 800 assembled generals, admirals and senior enlisted at Quantico, Va., on Sept. 30, 2025, quoted Eugene Sledge from his timeless classic With The Old Breed published in 1981.

Review: Leupold Rendezvous Soft Cases

Looking for something better than a cheap nylon bag, but don’t need it armored for air travel? Leupold has you covered.

Preview: Hiperfire Hipertrain

Hiperfire’s Hipertrain is a cast aluminum housing into which the AR-style trigger system, safety selectors and pistol grip of the user’s choice (none of which are included) can be installed to create a trigger demonstrator/dry-fire trainer

Interests



Get the best of American Rifleman delivered to your inbox.