The Smith and Wesson M1917 .45ACP: A Big-Bore World War Wheelgun (#3 – Allied Small Arms WWII)

Author’s noteThis article is part of an ongoing series on Allied small arms of World War 2. In each installment, we will endeavor to explore the humanity behind the firearms with which Allied combatants defeated the Axis powers. General George Patton once opined, “Wars may be fought with weapons, but they are won by men.”In this series, we will investigate both the guns and the men behind them in the context of the planet’s bloodiest conflict.

On an arid December afternoon in 1941, a motley three-vehicle convoy motored down a congested road in the Libyan Desert headed toward a roadhouse at Mersa Brega. The lead vehicle was a captured Italian Lancia truck. The two trail vehicles were filthy dust-covered British lorries. Filling all three vehicles was a combat patrol led by a hardened British soldier named Jock Lewes.

Lewes was an officer in a new sort of combat unit. Formed mere months earlier by an unconventional upstart British Lieutenant named David Stirling, this unit was tasked with sowing chaos and violence behind the lines of Erwin Rommel’s feared Afrika Korps. The motley group of misfits that made up this odd organization called themselves the Special Air Service. The British SAS ultimately changed the way the world fought wars.

The British SAS got its baptism of fire during the pitiless combat with Erwin Rommel’s Afrika Korps in the North African desert early in World War II. The unit’s charismatic founder David Stirling is shown standing beside the jeeps.

The road was crowded this day with German and Italian vehicles motoring back and forth performing the myriad logistical chores necessary to keep a modern army on the move and fighting. Captured vehicles had been pressed into service by both sides, so the parentage of the trucks in this small group caused no undue concern. The uniforms of the men crewing these vehicles were so ragged and dirt-encrusted as to remain comparably anonymous.

The British SAS changed the way the world fought wars. Many of these early special operations warriors preferred the reliability and firepower of the Smith and Wesson M1917 .45ACP revolver to that of lesser handguns.

The small SAS convoy pulled up to the Mersa Brega roadhouse right at dusk to find some forty-seven Axis military vehicles laagered there for the night. The SAS operators fanned out among the many German and Italian military trucks, most of which were occupied by enemy troops, and casually placed Lewes bombs in and around them. Lewes bombs were home-brewed SAS contrivances that combined a modest bit of high explosive with a time pencil that detonated the payload a certain specified period later. These time pencils were usually but not always predictable.

British time pencils were staples of unconventional warfare during World War II. These compact cylindrical devices consisted of a spring-loaded striker held in check by a piece of wire. One component of the device contained a small vial of acid that could be broken with a pair of pliers. Once the acid came in contact with the wire it ate away the material at a theoretically predictable rate. The larger the caliber of the wire, the longer the delay. Once the wire failed the striker was released to activate a blasting cap that detonated the bomb’s payload. In the days before reliable solid-state timers these time pencils represented the state of the art.

Time pencils were mechanical time delay detonators used by special operations troops in the days before solid-state timers.

A hapless Italian soldier approached Lewes and asked him for a light. This luckless driver was taken prisoner and roughly bundled into the back of one of the British vehicles. The man had to be gagged to suppress his uncontrolled weeping.

One of Lewes’ men named Dave Kershaw opened the door to an Italian truck in preparation for planting a bomb only to be greeted by a gunshot from the driver that missed him by mere inches. Blinded by the muzzle flash, Kershaw reflexively drew his M1917 .45ACP revolver, placed it to the bridge of the Italian soldier’s nose, and squeezed the trigger. The heavy .45-caliber bullet split the unfortunate man’s head open like a piece of fruit, killing him instantly.

This shot precipitated a one-sided gun battle that ran for another twenty minutes. Before the engagement was complete the SAS troopers had wrecked the roadhouse, killed upwards of twenty German and Italian soldiers, and detonated thirty-eight bombs on the various Axis trucks, one of which was brimming with incendiaries. They even inadvertently shot up a garish Italian truck with blacked out windows that they were later told was a rolling Italian military brothel.

The British SAS in World War II enjoyed great latitude in personal weapons. The M1928 Thompson was popular as was the M1917 revolver.

The SAS pioneered deep penetration special operations missions. These early special operators were offered great latitude in the equipment they used and the weapons they carried. While American M1928 Thompson submachine guns were popular primary long guns, the troopers’ sidearms spanned the spectrum. British Webley revolvers were common as were 1911A1 Colt pistols provided by the Americans along with the Tommy guns. For inimitable close range firepower and unquestionable reliability in the harsh Libyan Desert, however, nothing beat the Smith and Wesson M1917 revolver.

Wheelgun Firepower

The S&W M1917 .45ACP revolver was a militarized version of their civilian Second Model Hand Ejector. The resulting handgun was massively powerful and utterly reliable.

The M1917 revolver came into being in 1917 as a result of the exigencies of World War 1. The M1911 pistol was the finest combat handgun in the world at the time, but even with several companies operating at peak production supply could not keep up with demand. As a stopgap measure, the US Army contracted with both Colt and Smith and Wesson to adapt their large frame civilian revolvers to fire rimless .45ACP rounds for military use. Each company ultimately produced about 150,000 copies.

Rimless rounds like the .45ACP headspace on the case mouth rather than the rim. This means that the chambers of these guns could be cut to accommodate the geometry of these rounds, but there yet remained no reliable method for extraction of empty cases. The solution to this quandary came via the gifted insights of a Smith and Wesson engineer named Naomi Alan. Alan developed the lightweight disposable spring steel half-moon clip. Alan patented the design but allowed Colt to use it free of charge in support of their military version of the M1917.

The S&W M1917 was a militarized adaptation of their Second Model .44 Hand Ejector. This gun was designed from the outset to accommodate moon clips and included a lanyard ring on the butt. S&W had already supplied modified versions of this pistol chambered in .455 Webley for use by the British when production of Mk VI top-break revolvers was inadequate to meet wartime demands.

Practical Tactical

The Colt and S&W versions of the M1917 were functionally identical with one major exception. Breaking the action on the Colt gun involved pulling the cylinder release backward. The S&W design had to be pressed forward. Early Colt guns were not reliable in the absence of a moon clip. S&W pistols were designed from the outset to headspace on the case mouth so they were comparably reliable both with and without the clips in place. In the absence of a moon clip the star-shaped extractor lacked purchase, so empties had to be manually pressed out using a dowel or pencil.

Moon clips came in both 3 and 6-round versions. They are a bit tough to fill but remain fast in action.

Moon clips are tedious to charge but fast in action. Reloading simply involves breaking open the action, pressing the ejector to remove all six empties, and then dropping in a fresh clip or two. Full moon clips carry six rounds. Half moon clips pack three.

The double action/single action trigger found on all S&W revolvers is absolutely divine. The single action version lends itself to proper accuracy, while the double action variant offers consistency and safety. With a little practice, the gun is monotonously accurate in either mode.

Recoil is present but not unpleasant, and the beefy nature of the design keeps muzzle flip in check. The fixed sights are remarkably ample for the day and more than adequate for fast work at close quarters. These guns were finished in the same gorgeous deep blue that characterized S&W civilian pistols, though some were Parkerized later during the military rebuild process.


The British SAS in World War II used these three handguns primarily. From left to right are the M1911A1, the British Webley, and the M1917.

The M1917 was a stopgap solution during some desperate times but ultimately saw widespread military service for decades to come. The gun was popular with units like the British SAS and even saw a resurgence in popularity in the hands of tunnel rats during the Vietnam War some half a century later. Throughout it all the gun’s manly caliber and unflinching reliability made it a go-to arm for pitiless close quarters combat in filthy environments.

The M1917 revolver experienced a resurgence in popularity among tunnel rats in Vietnam. In this filthy horrifying close quarters environment, the revolver’s complete reliability was a boon.

Brad Pitt’s character in the epic action war movie Fury packs a .45ACP S&W M1917 with a Plexiglas sweetheart grip. Harrison Ford wielded a slightly modified version in some of the Indiana Jones films. Sedate on the range and sledgehammer powerful, the S&W M1917 transcended its original mission to earn an esteemed place in the annals of wartime Allied combat weapons.

Brad Pitt’s character in the war epic Fury packed a .45ACP S&W M1917 revolver with a Plexiglas sweetheart grip. Images from

Technical Specifications

Smith and Wesson M1917 Revolver

Caliber                  .45ACP

Weight                  2.25 lbs

Length                  10.8 in

Barrel Length      5.5 in

Action                   Double Action/Single Action

Sights                    Blade Front, Notched Rear

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About the author: Will Dabbs A native of the Mississippi Delta, Will is a mechanical engineer who flew UH1H, OH58A/C, CH47D, and AH1S aircraft as an Army Aviator. He has parachuted out of perfectly good airplanes at 3 o’clock in the morning and summited Mount McKinley, Alaska, six times…always at the controls of an Army helicopter, which is the only way sensible folk climb mountains. Major Dabbs eventually resigned his commission in favor of medical school where he delivered 60 babies and occasionally wrung human blood out of his socks. Will works in his own urgent care clinic, shares a business build-ing precision rifles and sound suppressors, and has written for the gun press since 1989. He is married to his high school sweetheart, has three awesome adult children, and teaches Sunday School. Turn-ons include vintage German machineguns, flying his sexy-cool RV6A airplane, Count Chocula cereal, and the movie “Aliens.”

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  • Iron Horse January 3, 2020, 4:51 am

    I have always been a fan of .45ACP revolvers that use the ingenious moon clips (half, full and even “third moon clips”, which are sort of a figure eight that’s open on the ends and hold two rounds that can be inserted into the bullet loops of a gun belt). The M1917 was the grandfather of them all. In addition to being a freak for the M1911 pistol, I’ve owned several Smith & Wesson and Colt M1917s over the years, along with the iconic half-flap holsters and canvas moon clip pouches. The full moon clips are even faster to use than speedloaders. If you think there’s anything wrong with these fine, historic handguns then you better stick to your plastic-frame 9mm and stay home and snuggle with your significant other.

  • Dixie Dave March 22, 2019, 12:07 pm

    First time I ever read that Model 1917s were used by “tunnel rats” in the Vietnam war. Why, when 1911s were readily available??? 7+1 beats 6 shots every time.

  • Altoids September 18, 2018, 8:51 am

    I came by one of these fine revolvers about 25 years ago.
    Unfortunately, it’s more of a wallhanger than anything. The cylinder throats are all eroded and the rifling in the barrel is almost gone. Still has a smooth as silk double action and has US Army markings.
    Found a replacement barrel some years ago, but no luck with a replacement cylinder.
    I’m a big fan of the .45ACP for years and own several 1911 style pistols. May end up purchasing one of the newer S&W revolvers chambered for the round.

  • Robert September 11, 2018, 12:15 pm

    Nothing new. Nathan Bedford Forrest did the same thing very well on horse back against the feared US Army during the war between the states.

  • דמד September 11, 2018, 2:13 am

    Israel used the same SAS concept in her 1948 War of Independence Negev Desert Campaign–they were named “Shualei Shimshon”–“Samson’s Foxes” : in homage to the fiery foxes deployed by the Biblical Samson !!!! דמד

  • Joe September 10, 2018, 11:51 pm

    No credit given to “Rogue Heroes: The History of the SAS . . .” by Ben Macintyre.

  • John Hoglin September 10, 2018, 8:57 pm

    I have a lend lease 1917 that was sold back to the US, it was originaly 455 Webley but some where along the line the cylinder was milled to use 45 Auto in mooon clips. It is very accurate and I would carry it anyday and not feel under gunned. It still has all the British proof marks. Great article.

  • Phil Dru September 10, 2018, 8:02 pm

    Bought a S&W 1917 marked “United States Property” in Texas in 1994 from a pawn shop for less than $100. Better than 95 percent. Blue finish. It was mismarked and had large target grips and a target trigger accessory. It has a star on the butt between US and Army I enjoy the 1917 information.

  • JCitizen September 10, 2018, 6:41 pm

    Funny how historians differ about the “Rat Patrol”; I once read that one of them claimed the SAS never used jeeps and only Chevrolet trucks; but a photo tells a lot, and there are hundreds of them showing them driving Jeeps as well.

  • Winston September 10, 2018, 6:28 pm

    The Soviet TT-33, firing the powerful 7.62x25mm Tokarev submachinegun round, was the best handgun of WWII. It was also adopted by the armies of the most populated countries of the world while the quaint and obsolete M1917 .45 ACP with its moon clips became a collector and museum curiosity.

    • Iron Horse January 3, 2020, 4:40 am

      Your stated-as-fact opinion is wrong. Completely wrong. But you are welcome to your delusions.

  • Scotty Gunn September 10, 2018, 5:26 pm

    My father carried one in WW2. He had the family chauffeur go downtown and bought a used one and mailed it to him. He was good with a revolver, but not the auto. Served him just fine on Okinawa. Unfortunately, he got rid of it after the war. i would have loved to have it.

  • Richie September 10, 2018, 12:20 pm

    Now that’s a men’s gun…. not little sissy gun like nine”

  • D.J. September 10, 2018, 11:38 am

    I own a repro S&W 1917 . Damned fine pistol . Moon clips act as a speed loader ,
    one cannot argue with the power of the .45 acp , and revolver …….. gotta love that .
    Not right for everyone , but suites me right down to the ground . Wouldn’t trade it !

  • Leslie September 10, 2018, 9:42 am

    The caption for the photograph of the three pistols has the S&W and the Webley flipped.

  • Carl September 10, 2018, 7:17 am

    Under the photo of Musings, the order is wrong The Webley is last

  • Andrew Antippas September 10, 2018, 6:58 am

    I am a Korean War combat veteran and a retired US Foreign Service Officer with 32 years service at 10 FS Posts world wide. I bought a Colt 1917 in 1961 and carried it in Central Africa, Vietnam and Cambodia among other unsafe places. I carried it for protection and practiced when I could with Embassy Marine Guards or friendly local police personnel. The 1917 is a great weapon.

  • Andrew Antippas September 10, 2018, 5:38 am

    I have owned a1917 Colt revolver since 1961. I am Korean War combat veteran and served 32 years in the US Foreign Service. I carried my 1917 in Central Africa, Vietnam and Cambodia for protection. I practiced with Embassy Marine guards. Great weapon.

  • Mark B. September 10, 2018, 5:18 am

    Great article, but I do believe that the photo depicting the M1911, M1917 and the British Welby is mis labeled. The M1917 is in the middle of the photo and the Welby is to the far right.

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