Colt M45A1: A Modernized M1911 For The Marines

posted on July 3, 2021
** 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. **
Coltm45a1

In Oct. 2016 the U.S. Marine Corps announced Glock 19s would replace the .45 ACP-chambered Colt M45A1s carried by members of its Marine Expeditionary Unit Special Operations Capable (MEUSOC) teams. The Picatinny-railed 1911s were officially adopted by the elite troops in 2012, and featured all the special touches required by those operating on or behind the front lines in the global war on terrorism.

Fans of the 1911 expressed their disgust as nearly 4,000 of the handguns were de-commissioned. The silence was deafening, though, when they became available and Colt continued to produce a civilian variant. At more than 100 years old, there’s undeniable attraction to the John Moses Browning design, even brand new ones with elegant upgrades that enhance performance without compromising his vision. Scarcely mentioning the soon-be-collectible kept demand low, and availability proportionately high.

“I was able to lay my hands on one of the decommissioned M45A1s to examine and evaluate it,” one author for American Rifleman wrote two years ago. “These decommissioned Colts will continue to be a hot item among both shooters and collectors for the foreseeable future. The pistols are exceptional purely as shooters, and scarce and significant for several military and historic reasons. We are fortunate that they found their way onto the public market.”

Models mustered out of the Marine Corps are scarce today and fetch lofty prices, but factory-fresh models with nearly identical features are still available from Colt. They feature Novak three-dot night sights, M1913-spec Picatinny rail and Decabond brown coating with nicely matching Desert Tan G10 grips.

Barrel length is 5 inches, dual recoil springs reduce perceived recoil and magazine capacity is seven rounds. A slight bevel at the magazine well enhances reload speed and the thumb safety is ambidextrous. Weight of the gun, empty, is listed at 40 ounces. MSRP comes in at $1,699.  

Latest

Shortage
Shortage

Suppressor Demand Outpaces Production

The demand for suppressors is setting new records. National Firearm Act (NFA) item purchases in September—primarily suppressors—more than doubled compared to the same month in 2025.

Book Review | Five Decades of a Fabulous Firearm: Celebrating the 50th Anniversary of the Beretta 92 Pistol Series

In this wide-ranging book, you’ll find a history of Beretta, discussion of developments leading to the Model 1951/951 Brigadier, its evolution into the Model 92 and the U.S. military’s adoption of the platform (as the M9) in 1985.

Review: Galco Revenger Holster & SB7 Gun Belt

For those who choose to carry a finely finished, K-frame revolver, Galco offers one of its finest concealed-carry setups in the form of its Revenger holster and SB7 gun belt.

Rimfire Power: The Primary Arms CLx 1-6x24 mm Riflescope with ACSS 22LR G2 Reticle

Low-power variable optics have become popular options for today's AR-15s and other modern sporting rifles, and Primary Arms now offers an option tailored for rimfire versions of those same guns.

Gun of the Week: Walther Arms PDP F-Series Pro-X PMM

One of Walther Arms' recent introductions combines the features of several other PDP handguns, meaning the Walther PDP F-Series Pro-X PMM is packed with a number of different design elements.

The Armed Citizen® Oct. 30, 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.

Interests



Get the best of American Rifleman delivered to your inbox.