SIG Sauer has earned its place among the world's most respected firearms manufacturers through decades of engineering excellence, military contracts, and unwavering commitment to quality. From the iconic P226 that served Navy SEALs to the revolutionary P365 that redefined concealed carry capacity, SIG pistols represent the intersection of Swiss-German precision and American innovation.
Whether you're a first-time buyer exploring the SIG ecosystem, an experienced shooter comparing models, or a collector tracking the brand's evolution, understanding the breadth of SIG's pistol lineup helps you make informed decisions.
This guide examines ten essential SIG Sauer pistols spanning micro-compacts, duty guns, and everything in between.
About SIG Sauer: A Legacy of Excellence
SIG Sauer traces its origins to 1853 in Switzerland, where the company began manufacturing wagons before transitioning to firearms production. The modern SIG Sauer emerged from a partnership between Swiss Industrial Company (SIG) and German manufacturer J.P. Sauer & Sohn, combining Swiss precision engineering with German manufacturing expertise.
Today, SIG Sauer, Inc. operates from Newington, New Hampshire, serving as the primary manufacturer for the U.S. civilian, law enforcement, and military markets. The company achieved a landmark victory in 2017 when the U.S. Army selected the SIG P320 as the M17/M18 Modular Handgun System, replacing the Beretta M9 that had served since 1985.
SIG's product philosophy emphasizes reliability, accuracy, and shootability across diverse platforms. The company produces hammer-fired DA/SA pistols continuing their classic legacy, striker-fired designs competing in the modern market, and innovative modular systems that allow unprecedented customization.
This diversity ensures SIG offers solutions for virtually every shooting application.
10 Essential SIG Sauer Pistols
1. SIG P238
The SIG P238 is a micro-compact, single-action-only .380 ACP pistol built on an aluminum-alloy frame with 1911-style controls. Measuring just 5.5 inches in overall length with a 2.7-inch barrel and weighing 15.2 ounces, the P238 delivers exceptional shootability in a genuinely pocket-sized package.
SIG introduced the P238 around 2009 as their first very small .380 for modern concealed carry, drawing design inspiration from the classic Colt Mustang. The platform offers 6+1 capacity with flush magazines or 7+1 with extended baseplates. Its single-action trigger and manual thumb safety enable cocked-and-locked carry in the 1911 tradition.
The P238 earned its reputation as one of the most pleasant pocket .380s to shoot, with full-sized SIGLITE night sights and a crisp trigger that outperform most competitors. While production continues on select variants, SIG has streamlined the lineup as the P365 family captures market share.
[Read our complete SIG P238 review →]
2. SIG P239
The SIG P239 is a single-stack, compact DA/SA pistol offered in 9mm, .40 S&W, and .357 SIG. This hammer-fired handgun features a 3.6-inch barrel in a frame measuring 6.6 inches overall, standing 5.2 inches tall and weighing approximately 25-29 ounces unloaded.
Introduced in the mid-1990s, the P239 served as SIG's slim alternative to the P229 for concealed carry and plainclothes duty roles. Magazine capacity runs 8+1 in 9mm or 7+1 in .40/.357 SIG. The platform earned a reputation for exceptional accuracy, rock-solid reliability, and comfortable ergonomics.
SIG discontinued the P239 in 2018 as consumer preference shifted toward lighter, higher-capacity polymer designs. However, its devoted following continues appreciating the refined DA/SA trigger and single-stack grip that fits smaller hands perfectly.
[Read our complete SIG P239 review →]
3. SIG P250
The SIG P250 is a modular, polymer-framed, hammer-fired DAO pistol available in 9mm, .40 S&W, .357 SIG, .45 ACP, and .22 LR. This innovative platform introduced SIG's serialized fire control unit (FCU) concept, allowing a single registered component to transfer between grip modules in full-size, compact, and subcompact configurations.
SIG launched the P250 around 2007 as their first modular polymer pistol, targeting law enforcement contracts. The long, smooth DAO trigger provides consistent pull weight for every shot with true second-strike capability. Magazine capacity reaches 17+1 in full-size 9mm configuration.
The P250's institutional testing challenges and the market's preference for striker-fired designs led to discontinuation around 2017. However, the FCU concept evolved directly into the phenomenally successful P320 platform, making the P250 an important chapter in SIG's development history.
[Read our complete SIG P250 review →]
4. SIG P290RS
The SIG P290RS is a sub-compact, hammer-fired DAO 9mm pistol designed for deep concealment. Measuring 5.5 inches in overall length with a 2.9-inch barrel and weighing approximately 20 ounces loaded, the P290RS offers 6+1 capacity with flush magazines or 8+1 with extended baseplates.
The "RS" designation indicates Restrike capability—the redesigned trigger system allows immediate re-engagement of a failed primer by pulling the trigger again. SIG introduced the original P290 in 2011 and the improved RS version in 2012, addressing early reliability concerns.
The P365's 2018 introduction effectively obsoleted the P290RS, offering similar or smaller dimensions with dramatically higher capacity and a lighter striker-fired trigger. SIG discontinued the P290RS around 2017, though it remains available on the used market for DAO enthusiasts.
[Read our complete SIG P290RS review →]
5. SIG P320
The SIG P320 is a modular, striker-fired 9mm pistol (also available in .357 SIG, .40 S&W, and .45 ACP) that won the U.S. Army's Modular Handgun System competition. The full-size 9mm measures approximately 8 inches in overall length with a 4.7-inch barrel, weighing 29.4 ounces and holding 17+1 rounds.
SIG introduced the P320 in 2014, building upon the P250's modular FCU concept with a striker-fired mechanism shooters overwhelmingly preferred. The serialized fire control unit transfers between grip modules in full-size, compact, and carry configurations, while caliber conversions expand versatility.
The P320 serves as the M17 (full-size) and M18 (carry-size) in U.S. military service. The platform continues expanding with X-Series enhancements, competition variants like the P320 MAX, and ongoing development that ensures long-term support.
[Read our complete SIG P320 review →]
6. SIG P365
The SIG P365 is a striker-fired micro-compact 9mm that revolutionized concealed carry capacity. Measuring 5.8 inches in overall length with a 3.1-inch barrel and weighing just 17.8 ounces, the P365 delivers 10+1 capacity in a package previously associated with 6-round single-stack pistols.
SIG introduced the P365 in 2018, and its patented modified double-stack magazine design immediately redefined market expectations. XRAY3 Day/Night sights come standard, and the platform has since expanded to include optics-ready variants, the P365X, P365 XL, XMacro family, and .380 ACP options.
The P365 remains SIG's flagship concealed carry platform with no discontinuation in sight. Its combination of capacity, concealability, and shootability has made it one of the best-selling pistols in America and the benchmark against which all micro-compacts are measured.
[Read our complete SIG P365 review →]
7. SIG P365-380 
The SIG P365-380 is a striker-fired micro-compact chambered in .380 ACP, sharing the P365's dimensions while offering dramatically reduced recoil. The platform features a redesigned recoil system specifically tuned for .380, resulting in softer shooting and easier slide manipulation than the 9mm variant.
SIG announced the P365-380 in February 2022 to address shooters who find 9mm micro-compacts too snappy or difficult to rack. The platform maintains 10+1 capacity with the same 5.8-inch length, 1.0-inch width, and approximately 15.7-ounce weight as its 9mm sibling.
The P365-380 specifically targets recoil-sensitive shooters, those with grip strength limitations, and newer carriers developing fundamentals. The ROSE by SIG Sauer edition addresses female shooters entering concealed carry. The platform remains in active production with ongoing development.
[Read our complete SIG P365-380 review →]
8. SIG P365 XMacro
The SIG P365 XMacro delivers 17+1 capacity in a frame just 1.1 inches wide, bridging micro-compacts and traditional duty pistols. The standard model features a 3.7-inch barrel while the COMP variant uses a 3.1-inch integrally compensated barrel for reduced muzzle flip.
SIG introduced the XMacro in August 2022 as the high-capacity answer for concealed carriers who refuse to compromise on firepower. The Macro grip module accommodates flush-fit 17-round steel magazines, while the standard 1913 Picatinny rail accepts full-size weapon lights.
The XMacro platform continues expanding with COMP variants, TACOPS editions, and ongoing refinement. Professional reviews document excellent reliability across 5,000+ rounds, positioning the XMacro as a serious duty-capable concealed carry option.
[Read our complete SIG P365 XMacro review →]
9. SIG P365X
The SIG P365X combines the original P365's short 3.1-inch barrel with the XL's extended grip module and optics-ready slide. This configuration delivers 12+1 capacity in a 6.0-inch overall length, optimizing the balance between concealment and shootability.
SIG introduced the P365X in 2021 after observing shooters combining standard P365 slides with XL grip modules. The factory configuration includes the XSeries flat trigger, XRAY3 Day/Night sights, and integrated magwell funnel for faster reloads.
The P365X remains in active production, often bundled with ROMEOZero optic packages. Many shooters consider it the optimal P365 configuration—the shortest slide for concealment paired with the extended grip for control.
[Read our complete SIG P365X review →]
10. SIG P938
The SIG P938 is a micro-compact, single-action-only 9mm built on an aluminum-alloy frame with 1911-style controls. Measuring 5.9 inches in overall length with a 3-inch barrel and weighing just 16 ounces, the P938 scaled up the successful P238 design to the more powerful 9mm chambering.
SIG introduced the P938 at SHOT Show 2011, offering 6+1 capacity with flush magazines or 7+1 with extended baseplates. The single-action trigger pulls at approximately 7.5-8.5 pounds with an exceptionally crisp break, and the ambidextrous thumb safety enables cocked-and-locked carry.
While SIG has streamlined the variant lineup, select models including the Legion remain in production. The P938 appeals to shooters who appreciate 1911-style operation and prioritize trigger quality over maximum capacity.
[Read our complete SIG P938 review →]
SIG Sauer Pistol Comparison Table
| Model | Caliber | Capacity | Action | Barrel | Weight | Status |
|---|---|---|---|---|---|---|
| P238 | .380 ACP | 6+1 | SAO | 2.7" | 15.2 oz | Limited |
| P239 | 9mm/.40/.357 | 8+1 | DA/SA | 3.6" | 25-29 oz | Discontinued |
| P250 | 9mm/.40/.357/.45 | 17+1 | DAO | 4.7" | 24-26 oz | Discontinued |
| P290RS | 9mm/.380 | 6+1 | DAO | 2.9" | 20 oz | Discontinued |
| P320 | 9mm/.40/.357/.45 | 17+1 | Striker | 4.7" | 29.4 oz | Active |
| P365 | 9mm | 10+1 | Striker | 3.1" | 17.8 oz | Active |
| P365-380 | .380 ACP | 10+1 | Striker | 3.1" | 15.7 oz | Active |
| P365 XMacro | 9mm | 17+1 | Striker | 3.7" | 22-27 oz | Active |
| P365X | 9mm | 12+1 | Striker | 3.1" | 17.8-20.7 oz | Active |
| P938 | 9mm | 6+1 | SAO | 3.0" | 16 oz | Limited |
| SP2022 | 9mm/.40/.357 | 15+1 | DA/SA | 3.9" | 29-30 oz | Limited |
Understanding SIG Sauer Action Types
SIG Sauer pistols utilize several distinct action types, and understanding these differences helps match the right platform to your needs and training background.
Single-Action Only (SAO)
The P238 and P938 operate in single-action-only mode with manual thumb safeties for cocked-and-locked carry. The hammer must be cocked before the trigger can fire the pistol, resulting in a short, light trigger pull with exceptional crispness. These platforms appeal to shooters trained on 1911-style operation.
Double-Action/Single-Action (DA/SA)
The P239 and SP2022 feature traditional DA/SA triggers with decocking levers. The first shot fires in heavier double-action (longer, heavier pull cocks and releases the hammer), with subsequent shots in lighter single-action. This system offers a deliberate first shot with faster follow-ups.
Double-Action Only (DAO)
The P250 and P290RS use DAO triggers where every shot fires with the same long, smooth pull—similar to a revolver. This consistent trigger simplifies training but requires adaptation from shooters accustomed to shorter trigger pulls.
Striker-Fired
The P320, P365 family, and related variants utilize striker-fired mechanisms with consistent trigger pulls for every shot. Modern striker-fired designs dominate the market for their simplicity, lighter weight, and ease of training.
Choosing Your SIG Sauer Pistol
For Maximum Concealment
The P365 and P365X deliver the best balance of capacity and concealability for everyday carry. The standard P365 provides absolute minimum size with 10+1 capacity, while the P365X adds an extended grip for improved control with 12+1 rounds.
For shooters preferring .380 ACP, the P365-380 offers identical dimensions with dramatically reduced recoil, and the P238 provides the smallest footprint for true pocket carry.
For Home Defense
The P320 full-size excels in home defense roles with 17+1 capacity, full-length accessory rail for weapon lights, and the softest recoil profile in the lineup. The P365 XMacro bridges carry and home defense with 17+1 capacity in a more compact package.
The SP2022 offers excellent value for home defense, combining proven reliability with 15+1 capacity and an integrated accessory rail at accessible pricing.
For 1911-Style Operation
Shooters who prefer single-action triggers and manual safeties should consider the P938 (9mm) or P238 (.380 ACP). These platforms deliver exceptional trigger quality and familiar 1911 controls in genuinely pocket-sized packages.
For Duty and Professional Use
The P320 serves as the U.S. military's M17/M18 and remains the premier SIG duty platform. Its modularity, capacity, and extensive variant lineup address virtually every professional requirement.
The SP2022 provides contract-proven DA/SA reliability at lower cost, though its near-discontinuation status affects long-term support considerations.
SIG Sauer Reliability and Quality
SIG Sauer's reputation rests on documented reliability across millions of rounds in military, law enforcement, and civilian service. However, understanding platform-specific considerations helps set appropriate expectations.
Military Validation
The P320's selection as the M17/M18 followed rigorous testing against major competitors. This validation confirms the platform meets the most demanding reliability standards in the firearms industry.
Law Enforcement Heritage
Platforms including the SP2022, P239, and P226/P229 served law enforcement agencies worldwide for decades. The SP2022's French national police contract ran through 2022, establishing long-term service credentials.
Early Production Considerations
Some SIG platforms experienced documented early-production issues that were subsequently resolved. The P365's initial 2018 production included striker-related concerns addressed in later manufacturing. The P320's early drop-safety concerns prompted a voluntary upgrade program. Current production of both platforms earns excellent reliability marks.
Maintenance Requirements
SIG pistols generally require routine maintenance consistent with any quality firearm. Recoil spring replacement intervals vary by platform—typically every 2,500-5,000 rounds depending on model and ammunition. Proper cleaning and lubrication ensure optimal function.
Frequently Asked Questions
What is the best SIG Sauer pistol for concealed carry?
The SIG P365 is widely considered the best SIG Sauer pistol for concealed carry, delivering 10+1 capacity in a micro-compact package measuring just 5.8 inches long and 1.0 inch wide. For shooters wanting more capacity, the P365 XMacro offers 17+1 rounds while maintaining impressive concealability at 1.1 inches wide.
Is SIG Sauer better than Glock?
SIG Sauer and Glock both produce excellent firearms, with the better choice depending on individual priorities. SIG offers superior factory triggers on most platforms, factory night sights, and optics-ready options. Glock provides simpler operation, lighter weight, and broader aftermarket support. Many shooters own both brands for different applications.
What SIG pistol does the U.S. military use?
The U.S. military uses the SIG P320 as the M17 (full-size) and M18 (carry-size) Modular Handgun System. SIG won the contract in 2017, replacing the Beretta M9 that had served since 1985. The military variants feature manual thumb safeties and coyote tan finishes.
Are SIG Sauer pistols reliable?
SIG Sauer pistols demonstrate excellent reliability across military, law enforcement, and civilian service. The P320's military adoption required passing rigorous reliability testing, and platforms like the SP2022 served European police agencies for decades. Current-production P365 variants earn consistently high reliability ratings in professional testing.
What is the difference between SIG P365 and P365X?
The SIG P365 features a 3.1-inch barrel with a shorter grip accommodating 10-round flush magazines. The P365X pairs the same 3.1-inch barrel with an extended grip module accepting 12-round flush magazines and adds an optics-ready slide. The P365X costs slightly more but offers improved control and optics capability.
Is the SIG P320 safe to carry?
The current-production SIG P320 is safe to carry. Early P320 production experienced drop-safety concerns that SIG addressed through a voluntary upgrade program. Updated pistols meet appropriate safety standards. Owners of earlier P320s should verify their pistol has received the upgrade through SIG's customer service.
What is the best SIG Sauer pistol for beginners?
The SIG P365 or P320 make excellent choices for beginners due to their striker-fired simplicity, consistent triggers, and extensive support resources. The P365-380 specifically suits new shooters who find 9mm recoil challenging, offering softer shooting characteristics that encourage practice.
Why are some SIG pistols discontinued?
SIG discontinues pistols when market demand shifts toward newer platforms. The P239, P250, and P290RS were discontinued as the P365 family captured concealed carry market share with higher capacity in similar or smaller packages. SIG focuses resources on actively-developed platforms like the P320 and P365 ecosystems.
What caliber is best for a SIG P365?
The 9mm P365 offers the best balance of capacity, terminal performance, and shootability for most users. The P365-380 in .380 ACP suits recoil-sensitive shooters or those with grip strength limitations. Both calibers provide adequate defensive capability when loaded with quality ammunition.
How long do SIG Sauer pistols last?
SIG Sauer pistols typically provide decades of reliable service with proper maintenance. The all-metal P238 and P938 are particularly durable, while polymer-framed platforms like the P320 and P365 require periodic recoil spring replacement (typically every 2,500-5,000 rounds). Many owners report 10,000+ rounds without significant issues on properly maintained pistols.
Final Thoughts
SIG Sauer's diverse pistol lineup offers solutions for virtually every shooting application. Whether you prefer the classic DA/SA operation of the SP2022, the 1911-style precision of the P938, or the modern modularity of the P320 and P365 family, SIG delivers quality engineering and proven reliability.
The company's commitment to innovation—from the P250's pioneering modular FCU concept to the P365's capacity revolution—demonstrates ongoing evolution while maintaining the quality standards that earned SIG its reputation. As you explore these platforms, consider your specific needs, training background, and intended applications to find the SIG Sauer pistol that best serves your requirements.
Each review linked above provides detailed specifications, performance data, user sentiment, and practical guidance for the specific model. Take the time to understand the platforms that interest you most, and you'll make an informed decision backed by comprehensive knowledge.