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FBI Guns & Ammo: A History of the Bureau’s Weapons

We take a historical walk through the FBI's duty guns and preferred calibers over the years. Want to know what the Feds carry? Come see!

    The Federal Bureau of Investigation was first formed in 1908, though it would be called simply the Bureau of Investigation, or BOI, until 1935.

    Since its formation, the Bureau has used a wide array of firearms for a variety of purposes. 

    FBI Agents Target Shooting
    FBI Agents getting some target practice in.

    Talking about all of them could fill several books, so today we’re going to focus on one particular category that most people find particularly interesting…duty guns.

    Of course, the FBI doesn’t issue announcements of every firearm acquisition or change that they do, so figuring out which arms were used at any particular time can be tricky.

    In addition, the FBI has made a lot of changes in weaponry over the years. 

    Wonder how many lists John was on...
    Basically the FBI.

    That means that much of the info presented here is based on documents from the FBI records vault or similar sources and may, therefore, be out of date or incomplete.

    The FBI obviously keeps certain things secret and I’m not going to pretend like this is some sort of tell-all reveal about the firearms and calibers that the FBI currently uses or has used in the past.

    FBI training range sign (Gun Digest)
    FBI training range (Gun Digest)

    Still, we’ll hit on some of the most significant changes in duty guns and calibers used by the FBI, talk about what events and problems led to those changes, and discuss how that panned out for the Bureau.

    So, let’s start at the beginning!

    Table of Contents


    1908 to 1933: The BOI Era

    There’s a myth that during the first almost three decades of the Bureau of Investigation’s existence, agents weren’t armed. 

    BIO Badge
    BIO Badge (FBI)

    The truth is there’s evidence that firearms were commonly available in field offices for agents to use in the 1920s or even earlier, though only in limited amounts. An excerpt from a Bureau manual dated 1929 lays out some rules regarding firearms.

    Section 11, Firearms: Employees are instructed: 

    a – That they are legally entitled to carry firearms for defensive purposes. 

    b – That, however, as a matter of policy, they are not to carry the same unless such action is authorized by their Special Agent In Charge.

    c – That they are never to use such firearms except for strictly defensive purposes. 

    d – That a supply of firearms is kept in each field office to be issued, when necessary, to the employees by the Special Agent In Charge.

    However, field offices chose their own weapons to stock and purchased them as needed. In addition, different field offices had their own policies on when agents were authorized to carry firearms. 

    This obviously led to a lot of variation from field office to field office. Agents were also subject to local laws related to carrying firearms, such as requirements for licensing. 

    The FBI Firearms Collection
    The FBI Firearms Collection, ca. the 1930s (FBI Archives)

    No formal shooting qualifications existed either. Agents also purchased their own ammunition to use for training Practice sessions usually involved shooting paper targets or at empty beer kegs rolled downhill.

    Though guns varies, we do know a few weapons that were issued during this period. 

    Some agents used the Smith & Wesson Model 1913, a .35 caliber semi-automatic pistol, Worth noting, this model was the first semi-auto pistol introduced by Smith & Wesson. 

    Smith & Wesson Model 1913
    Smith & Wesson Model 1913

    In addition, the Colt 1911, or Colt Government, also served alongside agents. No surprise considering the popularity of the .45 ACP 1911 then (or even now, really). 

    Old Colt 1911
    Colt 1911 Government

    We also know that the BOI issued the Smith & Wesson Military & Police in .38 Spl. This revolver is actually still in production to this day as the Smith & Wesson Model 10. 

    Smith & Wesson Military and Police .38 Special Revolver (Model 10)
    Smith & Wesson Military and Police .38 Special Revolver (Model 10)

    Reform in weapons policy really hit starting in 1934, primarily due to the Kansas City Massacre.

    1930s: Gangsters & the Kansas City Massacre

    The Kansas City Massacre occurred on June 17, 1933, when a group of gang members attacked a group of law enforcement officers at a train station in Kansas City, Missouri. 

    Kansas City Massacre 1933 (FBI)
    Just after the Kansas City Massacre 1933 (FBI)

    These law enforcement officers were transporting bank robber Frank Nash. Agents were returning Nash to the federal prison in Leavenworth, Kansas after his escape.

    The group included BOI agents, local Kansas City police, and an Oklahoma police chief, Otto Reed, who aided in Nash’s recapture.  

    During the attack, a shootout occurred in which four officers died, including Chief Reed, two Kansas City Police officers, and one of the federal officers. Surviving officers said the shootout only lasted about 30 seconds

    Kansas City Massacre diagram
    Only 30 seconds of shooting would change the face of law enforcement forever.

    This tragedy understandably worried Bureau leadership, including Director J. Edgar Hoover. It prompted questions about the ability of agents to protect themselves and eventually led to reform in the Bureau. 

    Legislation passed in 1934 expanding Bureau agents’ ability to carry firearms. It exempted them from barriers put in place by states for regular citizens, like licensing requirements. It also allowed agents to make arrests. 

    Previous laws limited agents to making only citizens’ arrests. So agents would have to wait for local law enforcement or a U.S. Marshall to arrive on the scene to make a formal arrest. 

    Bat Masterson (standing second from right), Wyatt Earp (sitting second from left), and other deputy marshals during the Wild West era
    US Marshalls were a distinct organization from the FBI, but they often coordinated. Bat Masterson (standing second from right), Wyatt Earp (sitting second from left), and other deputy marshals during the Wild West era

    But even before the new legislation passed, the BOI had already begun to make new weapons purchases in 1933 under Hoover’s direction. They’d continue to do so in the few years that followed. 

    Included in the purchases was an array of handguns, especially revolvers. 

    Bonnie and Clyde
    Bonnie and Clyde — the infamous couple that led to some serious reforms in how law enforcement handled inter-agency communication and more.

    One of the best documented of these revolvers was the Colt Police Positive Special revolver.

    This was a small-frame, 6-round cylinder revolver with a 4-inch barrel that shot .38 Spl. 

    Colt Police Positive Special revolver
    Colt Police Positive Special revolver

    In 1935, the Bureau also purchased Smith & Wesson Registered Magnum revolvers. Still in production, these models go by the Model 27 now.

    These N-frame revolvers shot .357 Magnum, which the Bureau chose for its ability to penetrate steel-plate vests and car bodies. 

    Hank Sloan with the S&W Registered Magnum .357 pistol in 1935
    Hank Sloan with the S&W Registered Magnum .357 pistol in 1935 (Historical G-Men)

    And speaking of personally owned firearms…

    In addition to the above, agents also used personal .38 caliber revolvers.

    Agents who opted to use personal revolvers typically did so because they wanted to carry something with a shorter barrel and smaller frame than their issued firearm. 

    Though they continued to use the .45 ACP 1911s, the Bureau also purchased additional 1911s field use as well as the Colt Government chambered in .38 Super.

    Like .357, .38 Super was favored because of its steel penetration.

    Thompson Submachine Gun
    Tommy guns might be your first thought for FBI firearms in the ’30s… but they had plenty of company!

    Despite 1911s at their disposal, revolvers were still by far the preferred sidearm — a trend that would reverse with time.

    The changes that occurred due to the Kansas City Massacre was the single largest change in weaponry in BOI and FBI history — all the other changes we talk about from here on out will be much smaller. 

    Introduction of Shooting Qualification Requirements

    With all of these weapon changes, there’s one other policy change that we should talk about. 

    SA John W. Core in the late 1930's at firearms practice with the Colt Monitor obtained by the Bureau during the 1930's.
    SA John W. Core in the late 1930’s at firearms practice with the Colt Monitor obtained by the Bureau during the 1930’s. (Historical G-Men)

    To make sure all agents were actually able to competently use all these shiny new guns, the BOI introduced shooting qualification requirements as well. 

    1940s Gangster Targets (Historical G-Men)
    1940s Gangster Targets (Historical G-Men)

    Agents must qualify with whichever gun they carried as their duty gun, whether personally owned or provided by the Bureau.

    FBI Rifle Training c. 1937 (Historical G-Men)
    FBI Rifle Training c. 1937 (Historical G-Men)

    Early on, this training happened at different military bases in the D.C. area. But, this ended up being too difficult for the military to accommodate.

    As an alternative, the BOI and Marine Corps arranged to allow the Bureau to use the Quantico, Virginia base for training. 

    1930s Quantico training range with a dummy target for sharpsooting (Historical G-Men)
    1930s Quantico training range with a dummy target for sharpsooting (Historical G-Men)

    Quantico is still used by the FBI for this purpose today.

    1970s: The FBI’s Last Revolver

    The FBI duty gun would see another big change in the 1970s.

    Agents at this time struggled with the large revolvers they’d been using. The wheelguns were less than practical for agents to carry, especially discreetly

    What Gun Printing

    At the same time, shorter barrel alternatives didn’t provide the accuracy the Bureau needed. So, the Bureau attempted to strike a balance.

    The first attempt was a false start with the Smith and Wesson Model 10-6, a .38 Spl. variant of the S&W Model 10 with a 2.5-inch barrel. 

    Smith & Wesson Model 10-6
    Smith & Wesson Model 10-6

    Unfortunately, the FBI was unhappy with the short sight radius. Not to mention, the ejector rod wasn’t long enough to reliably eject cases. That’s not ideal for reloading in the middle of a gunfight, obviously. 

    Fortunately, Smith & Wesson learned from their mistake and created the Model 13. This revolver offered a K-frame double-action design, chambered in .357 magnum, with a round butt and a 3-inch barrel. 

    Smith & Wesson Model 13-1 .357 Mag Double Action Revolver
    Smith & Wesson Model 13 .357 Mag Double Action Revolver

    Since .38 Spl. can safely fire from a .357 revolver, most agents continued to use the standard .38 Spl. service load, 158-grain lead hollow point +P.

    However, they also had the option of using the Bureau’s standard .357 Magnum round — Winchester 145-grain Silvertip.

    38 Special vs. 357 Magnum (Lucky Gunner)
    .38 Special vs. .357 Magnum (Lucky Gunner)

    The Model 13 performed well and was well-loved by agents, but it would end up being the last revolver that the FBI issued before switching to semi-automatic pistols. 

    1980s: Semi-Automatic Pistols & the 1986 FBI Miami Shootout

    In the early 1980s, the FBI began really shifting towards semi-auto pistols beyond just the 1911. First up, the Smith & Wesson Model 459 — a double/single-action pistol in 9mm Luger. 

    Smith & Wesson Model 459 (SurvivalBlog)
    Smith & Wesson Model 459 (SurvivalBlog)

    Originally intended for SWAT teams, these pistols were adopted by many other agents — especially younger agents. The 459 was known for being both highly accurate and highly reliable and was used in numerous shootouts.

    One particular shootout, though, caused it to fall out of favor.

    On April 11, 1986 eight FBI agents got into a shootout with two bank robbers.

    1986 FBI Miami Shootout
    1986 FBI Miami Shootout

    The shootout ultimately culminated in the death of two of the agents and the wounding of five others. Both agents who died carried Model 459s, while the wounded had a mix of .357 and .38 revolvers.

    Though both robbers died, one suffered six gunshot wounds and the other 12.

    Agent Jerry Dove's Pistol
    Agent Jerry Dove’s S&W Model 459 from the 1986 Miami shootout.

    This understandably led to concern from the FBI forcing the Bureau to adopt higher ballistic criteria for their rounds. They soon began looking for more powerful alternatives. 

    Of course, decisions like this never involve everyone happy agreeing on the same solution. 

    agree to disagree
    If only we’d be so lucky…

    Some wanted to switch over to .45 ACP, while others wanted to stick with 9mm but go with more powerful rounds.

    To try to balance the strengths and weakness of .45 ACP and 9mm, the FBI opted for the 10mm — the only .40 caliber round available at the time. 

    .40 S&W vs 10mm
    .40 S&W vs 10mm

    But, there were a couple of problems with this. First, the highly pressurized 10mm round was well beyond what the average agent was used to. 

    Second, There were only two large-frame 10mm pistol manufacturers at the time, Colt and Smith & Wesson. 

    To at least solve the first problem, the FBI adopted a downloaded 10mm paired with the Smith & Wesson Model 1076, a double/single-action pistol with a 4.25-inch barrel. 

    Smith & Wesson Model 1076
    Smith & Wesson Model 1076

    But the Model 1076 proved unreliable, not to mention too bulky for reasonable concealment. The long case used by 10mm presented an issue either way.

    So, the FBI switched back to 9mm, pairing it with the Sig Sauer P226. The P226 was both compact and reliable, solving both of the problems with the Model 1076. 

    Sig P226 looking awesome
    The Sig Sauer P226

    Shortly after, the FBI also adopted the P228 — an even more compact double-stack variant of the P226.

    The P226 would end up in the hands of FBI SWAT, while the P228 became more popular for general field agents. 

    SIG P228
    SIG P228

    1990s: The Switch to .40 S&W

    What the FBI didn’t know…Smith & Wesson and Winchester were working together to develop a round that would replicate the ballistics of 10mm but use a shorter case like the one on 9mm. 

    .40 S&W Round
    .40 S&W Round

    They achieved this with .40 S&W, introduced in January 1990. It premiered alongside the Smith & Wesson Model 4006, a semi-auto pistol chambered for the new round.

    It took months before Smith & Wesson’s Model 4006 actually hit shelves. In the meantime, Glock beat them to the punch unveiling the full-size G22 and compact G23 in.40 S&W.

    Glock 22 with Surefire X300
    Glock 22 with Surefire X300

    In 1997, the FBI adopted .40 S&W along with both the G22 and the G23.

    The era of the Plastic Fantastics was going strong!

    2010s: The Return to 9mm Luger

    The .40 S&W and Glock pairing continued to serve the FBI for almost two decades.

    But in 2014, the FBI made a surprisingly decision to switch back to 9mm Luger. 

    9mm Vs. .380 ACP
    9mm vs. .380 ACP

    After all, 9mm had come a long way since the 1980s.

    Based on ballistics trials, the FBI labeled 9mm sufficient for their purposes. It also outperformed .40 S&W and .45 ACP. 

    Popular Pistol Calibers
    Popular Pistol Calibers

    In 2015, the FBI put out a Request for Proposals (RFP) asking gun manufacturers to submit handguns to supply agents with duty guns.

    In 2016, they awarded an $85 million contract to Glock for the G17M, a modified version of the Glock 17.

    glock gen 5 17m
    Glock Gen 5 17M

    However, the FBI says “agents carry Bureau-issued or approved handguns,” so don’t think any given agent carries the G17M. While the Bureau hasn’t released a list of their issued or approved handguns, we do know that 9mm and the G17M hasn’t totally replaced .40 S&W and the older two Glocks. 

    But it’s also fun to wildly speculate about what else might be on that list. 

    conspiracy theory guy
    We’re always down for a good wild speculation!

    We know that FBI SWAT uses the SIG Sauer P226 in 9mm and custom Springfield M1911A1s in .45 ACP, so one or both of these guns may be used by some general field agents as well. 

    Based on the use of the P226, they may also use P228s in 9mm. 

    Swat van
    SWAT Van


    The FBI hasn’t released a complete list of their currently issued or approved duty guns, that information has historically been kept away from the public…so who knows how many duty guns the FBI has used over time that weren’t included here?

    Desire to Know More
    Must. Know. More.

    In addition, duty guns are far from the only firearms used by the FBI — I could write several other posts about the other guns the FBI has used, such as sniper rifles and machine guns, not to mention those used by special teams like SWAT and Hostage Rescue.

    And, of course, there are non-firearm weapons like those used for riot control.

    FBI SWAT Legos
    We thought about finding actual pictures of the FBI SWAT teams, but Legos are so much more fun.


    In other words, this shouldn’t be looked at as a complete list of FBI weaponry, firearms, or even just duty guns. 

    Still, I think it provides an interesting and informative look into the history of the FBI, giving us a peek into firearms technology duringdifferent eras, as well as the FBI’s decision-making process and priorities throughout their history.

    FBI Agents training with their sidearms (USA Today)
    FBI Agents training with their sidearms (USA Today)

    What did you think? Did the FBI make the right call moving to 9mm recently, or should they have stuck with something bigger? What’s your favorite FBI duty gun? Tell us all about it in the comments! Like history? Check out the Guns Used in Famous Assassinations!

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    4 Leave a Reply

    • Commenter Avatar
      Donn Jacquin

      The FBI also adopted a Glock 19m which has a reduced trigger and better sights for example.

      December 20, 2022 5:11 pm
    • Commenter Avatar
      Carlos T. Jackal

      Glocks are ugly, ugly guns. Will never get one.

      December 8, 2022 3:39 pm
      • Commenter Avatar
        Levi Roberts

        Its not about how it looks, its about how it functions. Just like the Grease Gun from WW2. practically junk in terms of looks but functioned exceptionally well especially when they addressed the original ones flaws. A Glock may be ugly but they perform well. Personally I do prefer a revolver or a M1911 (silver finish) for looks, but for practical use in defense a glock is reliable.

        January 17, 2023 1:01 am
    • Commenter Avatar

      Very interesting! I love reading about military and LE weapons and the reasons those weapons are selected! Even more interesting to me, my first SA pistol was a S&W 459 I bought from an LE buddy of mine in the mid-80's. Unfortunately it turned out to be a total lemon, completely inaccurate and unreliable with FTE issues. When I bought it my buddy said, "Thank God I never had to use it on the job." My EDC now is a G23 in .40 S&W which is very accurate and has been 100% reliable for the nine years I've had it. Next on my list is a 1911 in .45, just because.

      March 16, 2021 9:39 am
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