Glock 19 vs Sig P320: Comparing Popular Handgun Contenders

In the world of handguns, two models have come to the forefront of the ongoing debate on superiority: the Glock 19 and the Sig Sauer P320. Both handguns command respect in the firearms community for their reliability and versatility, establishing them as top choices for self-defense, law enforcement, and shooting enthusiasts alike. Each model brings a heritage of trusted performance, with the Glock 19 enjoying an enduring reputation since its release and the Sig Sauer P320 earning its stripes as a newer contender with innovative features.

The Glock 19 and Sig Sauer P320 have sparked discussions and comparisons, given that both are striker-fired, compact and chambered in 9mm Luger – a popular caliber for its balance of power and control. While sharing some basic similarities in role and function, they diverge in design philosophy, modularity, and ergonomics, reflecting the unique approaches of their manufacturers. Such differences are significant to potential buyers, influencing their decisions based on individual preferences in handling, customization, and overall firearm experience.

Key Takeaways

  • The Glock 19 and Sig Sauer P320 are renowned for their reliability in various roles, including self-defense and law enforcement.
  • They offer distinctive features and designs, accounting for personal preference in ergonomics and modularity.
  • The debate between the two handguns is often centered around individual performance, customization options, and the user community's varied opinions.

History and Development

The Glock 19 and the SIG P320 are renowned firearms that have become benchmarks in the handgun industry. Each has a storied background marked by innovation and adoption by military and law enforcement agencies.

Evolution of Glock 19

The Glock 19 was introduced by the Austrian manufacturer Glock Ges.m.b.H in 1988. It marked an evolution in Glock's lineup as a compact version of their original Glock 17, retaining the high capacity and reliability that had become synonymous with the brand. Designed for military and law enforcement use, the Glock 19 quickly became popular due to its reduced size, making it ideal for concealed carry while maintaining a 15-round capacity of 9mm.

Development of Sig P320

The SIG P320, manufactured by SIG Sauer, is a modular handgun system introduced in 2014. It evolved from the earlier SIG P250, using a similar modular design but with a striker-fired mechanism, in contrast to the double-action-only P250. This design allows users to change calibers, barrel lengths, and grip sizes, adapting to various roles and user preferences. In 2017, the P320 gained significant recognition when the U.S. Army chose a variant, the M17 as their service pistol to replace the Beretta M9, a testament to its versatility and performance.

Design and Features

The Sig P320 and Glock 19 showcase distinctive design philosophies and features that cater to varied preferences in ergonomics, materials, and safety requirements. Both pistols offer attributes that are hallmarks of their brand's commitment to reliability and durability.

Ergonomics and Handling

The Sig P320 features a modular design, allowing users to easily swap out grip modules to fit different hand sizes, making its ergonomic design highly customizable. It also boasts a higher bore axis, which may affect muzzle flip during firing. In contrast, the Glock 19 is known for its simple and consistent ergonomics across its models, with a lower bore axis that can assist in controlling recoil. Both firearms offer textured grips to enhance handling.

  • Sig P320: Modular grip, customizable ergonomics, higher bore axis.
  • Glock 19: Uniform grip design, lower bore axis, less customizable.

Material and Durability

Constructed primarily from polymer materials, both handguns are lightweight yet rugged. The Glock 19's polymer frame is renowned for its durability and has a longstanding reputation for reliability under various conditions. Meanwhile, the Sig P320 also features a robust polymer frame, with the additional advantage of its modular stainless steel chassis, which adds to the durability and longevity of the firearm's core.

  • Sig P320: Polymer frame, stainless steel chassis.
  • Glock 19: Proven polymer frame.

Safety and Maintenance

Safety features in both firearms include internal mechanisms designed to prevent accidental discharges. The Glock 19 has a unique safety system that consists of trigger safety, firing pin safety, and drop safety. The Sig P320 also includes several internal safeties but does not have an external trigger safety, relying instead on a striker disconnector and a robust internal drop safety system.

Regular maintenance is straightforward for both models due to their designs. The Glock 19 typically requires minimal maintenance, with a reputation for functioning reliably over long periods without extensive care. The Sig P320's design also facilitates ease of maintenance, as its fire control unit is removable, enabling simple cleaning and parts replacement.

  • Sig P320: No external trigger safety, internal drop safety, and simplified maintenance due to modular design.
  • Glock 19: Integrated trigger safety, multiple internal safeties, low maintenance requirements.

Technical Specifications

In comparing the Glock 19 and the Sig Sauer P320, the technical specifications are critical indicators of performance, size, and suitability for various uses. These handguns' dimensions, weight, and caliber impact their handling and application in personal defense to competitive shooting scenarios.

Dimensions and Weight

The Glock 19 typically has a more compact profile, often making it a preferred choice for concealed carry. Its specifications are as follows:

  • Length: 7.36 inches
  • Height: 5.04 inches
  • Width: 1.26 inches
  • Weight (unloaded): 23.63 ounces

On the other hand, the Sig Sauer P320 presents slightly larger dimensions, which may influence grip comfort and concealability:

  • Length: 7.2 inches (Compact Frame)
  • Height: 5.3 inches (Compact Frame)
  • Width: 1.3 inches
  • Weight (unloaded for Compact Frame): 25.8 ounces

Caliber and Capacity

Both models are chambered for the widely used 9mm Luger cartridge but offer variants in other calibers, including .357 Sig, .40 S&W, and .45 ACP. The capacity differs based on the model and caliber:

Glock 19:

  • Caliber: 9mm Luger
  • Standard Magazine Capacity: 15+1 rounds

Sig Sauer P320:

  • Caliber: 9mm Luger (other calibers available)
  • Standard Magazine Capacity for 9mm: 17+1 rounds (varies by model)

Barrel and Slide

A firearm's barrel and slide are essential components that contribute to its overall performance and accuracy.

Glock 19:

  • Barrel Length: 4.02 inches
  • Slide: The slide is designed for durability and features a nitride finish that provides corrosion resistance.

Sig Sauer P320:

  • Barrel Length: 3.9 inches (Compact Frame)
  • Slide: The P320's slide includes a stainless steel construction with a Nitron finish for similar durability and resistance to the elements.

These details showcase the inherent contrasts in design and capability between the Glock 19 and the Sig Sauer P320, providing potential users with the information needed to make an educated decision based on their requirements for size, firepower, and handling characteristics.


When comparing the Glock 19 and the Sig Sauer P320, one can expect to observe distinct differences in their performance, specifically in terms of accuracy, reliability, and trigger mechanisms.

Accuracy and Reliability

Glock 19:

  • Accuracy: Renowned for its consistent accuracy, the Glock 19 boasts a precision barrel and tight tolerances that contribute to its reliable shot placement.
  • Reliability: It has a reputation for dependable performance in diverse conditions, backed by a simplistic design that reduces the likelihood of malfunctions.

Sig Sauer P320:

  • Accuracy: The P320 offers a modular grip and a straight trigger that enhances shooter ergonomics, which can improve accuracy for many shooters.
  • Reliability: Its reliability is affirmed by its adoption by various law enforcement agencies, demonstrating its capability to function effectively under stress.

Trigger Mechanism

Glock 19:

  • Type: The Glock 19 uses a striker-fired mechanism with a tabbed trigger to prevent accidental discharges.
  • Pull & Break: The trigger pull is generally rated as smooth with a firm break, and the reset is short, allowing for fast follow-up shots.

Sig Sauer P320:

  • Type: This pistol also employs a striker-fired system but with a bifurcated trigger that some shooters find more comfortable.
  • Pull & Break: The P320 typically has a slightly lighter trigger pull than the Glock 19 and is known for a clean and crisp break.

Aesthetics and Customization

In the Glock 19 and SIG P320 debate, the potential for customization and aesthetic appeal are significant factors for consumers. Both models offer distinct options for personalization but differ in their approach to modularity and aftermarket support.

Accessories and Modularity

Glock 19:

  • Aftermarket Parts: The Glock 19 leads with a vast array of aftermarket parts, allowing for extensive customization. Owners can find numerous options for slides, grips, triggers, and magazine extensions, making it highly customizable to individual preferences.
  • Accessory Rails: Glock 19 supports various attachments such as lights and lasers and is equipped with a universal accessory rail.

SIG P320:

  • Caliber Conversion: One of the prominent features of the SIG P320 is its caliber conversion capability. Users can switch between different calibers using exchange kits.
  • Modularity: The P320's modular design allows the shooter to change the grip module, slide, barrel, and even the firearm's caliber. This modularity extends beyond simple customization, providing functional versatility.


Glock 19:

  • The design is practical and no-nonsense. Its appearance is recognizable and has maintained a consistent aesthetic over the years. The options for aesthetic modification are plentiful due to the extensive aftermarket support.

SIG P320:

  • SIG P320 offers a more contemporary look with ergonomic features such as a higher beavertail and undercut trigger guard. Customization can also enhance the P320's aesthetics, though the options are less ample than the Glock's.

Practical Usage

The Glock 19 and SIG P320 are highly regarded in their practical applications, offering flexibility in carry options, service pistol utilization, and across law enforcement and civilian domains.

Carry Options

Both handguns are designed with 9mm cartridges, which provide a balance of stopping power and manageable recoil. The Glock 19 is favored for its compact size, making it an ideal concealed carry weapon that doesn't compromise ammunition capacity. It is often called a "Goldilocks gun" for its just-right size and capabilities.

  • SIG P320
    • A modular design allows for various grip, slide, and barrel sizes.
    • Different carry configurations can be achieved without purchasing a new firearm.

Service Pistol Utilization

In the realm of service pistols, both the Glock 19 and SIG P320 offer features conducive to regular use in various professions. They are both striker-fired pistols known for their reliability and ease of use.

  • Glock 19

    • Military forces and security personnel worldwide extensively use it.
    • Renowned for its durability and consistency in harsh conditions.
  • SIG P320

    • Selected as the U.S. Army's M17/M18 service pistol under the XM17 Modular Handgun System competition.
    • Features a modular grip module and ambidextrous controls, serving diverse hand sizes and shooting preferences.

Law Enforcement and Civilian Use

The Glock 19 and SIG P320 are omnipresent in law enforcement and among civilian users due to their reliability and ergonomic designs.

  • Glock 19

    • Preferred for its ease of carry and holstering, facilitating quick deployment.
    • High-capacity magazines and consistent trigger pull make it a solid choice for law enforcement.
  • SIG P320

    • It is utilized by various police units due to its customizability to fit the role of a duty weapon or concealed carry.
    • Its removable fire control unit paves the way for a personalized handgun experience for civilian enthusiasts.

Purchase and Ownership

When considering the Glock 19 and Sig P320, potential buyers should evaluate the initial cost and the long-term value of each firearm. They should also familiarize themselves with how handguns can be bought or sold.

Cost and Value

Glock 19:

  • Cost Range: Approximately $500-$700
  • Value: High resale value, consistent demand

Sig P320:

  • Cost Range: Approximately $450-$750
  • Value: Modular system may add value, good resale potential

The Glock 19 and Sig P320 are priced competitively, with the cost reflecting their reliability and brand reputation. The value of a firearm goes beyond its purchase price, considering factors like durability, performance, and demand in the resale market. Both models are known for maintaining high value over time.

Buying and Selling Options

Online: Both handguns are extensively available online, with various dealers sometimes presenting daily deals. Purchasers should research and ensure compliance with local laws when buying firearms online.

  • Daily Deals and Quick Cash Offers: These may vary depending on the seller or specific promotions

Dealer: Authorized dealers are the most reliable source for new models and often provide warranties.

  • Trade-In: Dealers may accept trade-ins, offering credit towards a new purchase

Selling a Firearm:

  • Owners can sell these firearms privately but should follow all legal procedures for transferring ownership.
  • Sites dedicated to firearm sales provide a platform to list and sell to interested buyers, with some offering quick cash options.

Whether trading in at a dealer for the latest model or seeking quick cash from a private sale, owners of the Glock 19 and Sig P320 have various options to consider when buying or selling these firearms.

Comparative Analysis

In this section, the Glock 19 and SIG P320 are meticulously examined to delineate their attributes and popularity within the firearm community.

Side-by-Side Comparison

Dimensions and Weight

  • Glock 19
    • Weight (unloaded): 23.63 oz.
    • Length: 7.28 inches
    • Height: 5.04 inches
    • Width: 1.26 inches
    • Barrel Length: 4.01 inches
  • SIG P320
    • Weight (unloaded): 29.5 oz.
    • Length: 7.2 inches
    • Height: 5.3 inches
    • Width: 1.3 inches
    • Barrel Length: 3.9 inches


  • Glock 19: Standard magazine holds 15 rounds.
  • SIG P320: Standard magazine holds 17 rounds.


  • Glock 19: Customizable with a variety of aftermarket parts.
  • SIG P320: A modular design allows users to swap out the fire control unit between different grip modules and slide lengths.

Caliber Both models are chambered in 9mm, a popular choice for self-defense, law enforcement, and sport shooting.

Popular Comparisons

When considering the Glock 19 versus the SIG P320, enthusiasts often compare the models to other firearms regarding performance, reliability, and adaptability. A frequent comparison is between the Glock 19 and the Beretta 92FS.

  • Beretta 92FS:
    • Weight (unloaded): 33.3 oz.
    • Length: 8.5 inches
    • Height: 5.4 inches
    • Width: 1.5 inches
    • Barrel Length: 4.9 inches
    • The standard magazine holds 15 rounds

The Glock G19 generally provides a more compact frame than the Beretta 92FS, often preferred for its historical significance and metallic frame. Each handgun caters to different weight, balance, and material construction preferences. The P320's modularity gives it an advantage for users seeking a tailored ergonomic experience and the ability to change firearm configurations without purchasing an entirely new pistol.

Community and Industry Opinions

The Glock 19 and the SIG P320 are highly debated within firearms communities, with enthusiasts and experts often divided on which pistol is best in class. Each camp presents compelling arguments based on factors like overall length, handling, and reliability, which continue to fuel ongoing discussions.

Enthusiast Debates

Among firearms enthusiasts, forums and discussion boards often reflect a split vote in the Glock 19 vs. SIG P320 debate. Supporters commend the Glock 19 for its compactness and trusted track record, drawing attention to its overall length of 7.36 inches, which makes it a preferred choice for concealed carry. Meanwhile, advocates for the SIG P320 highlight its modular design and the ability for shooters to customize grip sizes to their preference, which the Glock less readily affords.

Enthusiasts deeply engaged in these debates tend to analyze every facet of these pistols, from magazine capacity to trigger pull nuances. No final verdict has been unanimously agreed upon, as personal preference and specific use cases greatly influence each individual's vote.

Expert Reviews

In the realm of expert opinions, industry professionals conduct thorough reviews that often touch upon the technical specifications and performance under various conditions. The Glock 19's renowned durability and simplicity make it a frequently recommended option for new and experienced shooters. However, the SIG P320 often earns praise for its innovative features, such as its striker-fired system and easy disassembly without pulling the trigger, marking high scores for safety and maintenance.

These expert reviews are usually based on testing each pistol in controlled environments to assess accuracy, ergonomics, and reliability. They provide a more structured analysis than the subjective enthusiast debates but tend to avoid declaring an absolute best pistol due to the subjective nature of firearms preference.


When deciding between the SIG P320 and the Glock 19, prospective buyers must assess their preferences, intended use, and comfort with each firearm's characteristics. The Glock 19 is renowned for its reliability, boasting a standard 15-round magazine capacity and a 4.02-inch barrel, contributing to its compact design with an overall length of 7.36 inches.

The SIG P320, on the other hand, offers modularity and a customizable grip to fit different hand sizes. Both handguns chamber the 9x19mm caliber round, supporting their reputation for efficiency and consistent performance.

Weight might be a deciding factor for some, as the Glock 19 is slightly heavier when the empty magazine is 23.63 ounces. Dimensions are similar, with both weapons measuring around 7 inches in overall length. Handling and trigger pull experiences differ, with users often praising the SIG P320 for its smooth action and the Glock 19 for its crisp break.

Users should consider the following when choosing between the two:

  • Ergonomics: Grip and hand fit.
  • Capacity: Standard magazine size.
  • Weight: Importance of firearm weight for carrying.
  • Reliability: Track record in various conditions.
  • Customizability: Ability to modify or change parts.
  • Aesthetics: Personal preference regarding the look and feel.

In the end, both the SIG P320 and the Glock 19 stand as excellent choices, each with a dedicated following, and one's preference will be subject to individual needs and comfort with the weapon system.

Frequently Asked Questions

When comparing the Glock 19 and the Sig P320, buyers often inquire about their performance in distinct areas. These frequently asked questions provide a focused look into the specifics of accuracy, compact models, handling, pricing, size, and weight, helping to guide a more informed choice between these two popular firearms.

What are the key differences between the Glock 19 and Sig P320 regarding accuracy?

The Glock 19 and the Sig P320 both offer commendable accuracy. The Glock 19 has a well-established reputation for reliability and consistent performance. The Sig P320 boasts a modular grip system and a straight trigger that some shooters find enhances accuracy.

What considerations should be considered when comparing the Glock 19 and Sig P320 compact models?

Consider ergonomics, magazine capacity, and the adaptability of the grip size when comparing the compact models of the Glock 19 and Sig P320. While the Glock 19 has a proven track record in the compact category, the Sig P320 offers modularity for greater customization.

How do the Glock 19 and Sig P320 differ in handling and shootability?

The Glock 19 is known for its crisp trigger and predictable recoil, which many shooters find results in quick follow-up shots. The Sig P320, on the other hand, provides a smooth and consistent trigger pull, with a slightly higher bore axis that may affect recoil management for some shooters.

What are the price comparisons between the Glock 19 and Sig P320?

Price can vary based on each gun's specific model and features, but generally, the Glock 19 can be less expensive than the Sig P320. However, prices may change, so prospective buyers should check the market for the most up-to-date pricing.

How does the size and weight of the Glock 19 compare to the Sig P320?

The Glock 19 is known for its compact size and relatively lightweight, which makes it a popular choice for concealed carry. The Sig P320 is slightly larger overall, which may contribute to its perceived balance in hand, but this also may make it less ideal for certain concealed carry situations.

What are the reasons that might influence someone to choose a Glock 19 over a Sig P320 or vice versa?

Buyers might prefer the Glock 19 for its proven durability, extensive aftermarket support, and lower cost of ownership. Alternatively, the Sig P320 is favored for its modular design, which allows for easy caliber changes and customization, as well as its comfortable grip and trigger feel. Personal preference in handling, ergonomics, and overall feel are also deciding factors.

Back to blog