Glock 31 Gen 4: Complete Buyer’s Guide, Review, Price & FAQs

The Glock 31 Gen 4 remains a distinctive full-size pistol chambered in .357 SIG, combining Glock’s established Safe Action system with the ergonomics and modularity associated with the Gen4 platform. Designed around the .357 SIG cartridge, the G31 Gen4 features a 4.49-inch barrel, a standard 15-round magazine capacity, and a full-size frame intended for users who prefer the dimensions of a duty-sized handgun.

The glock 31 gen 4 continues to attract attention among firearm collectors, Glock enthusiasts, and people researching the history and specifications of .357 SIG pistols. Glock’s official specifications identify the G31 Gen4 as a .357-caliber pistol with a 7.95-inch overall length, 5.47-inch height, 1.26-inch overall width, and an unloaded weight of 23.28 ounces.

The Glock 31 357 SIG combination is particularly notable because the G31 represents the full-size member of Glock’s .357 SIG family. The G32 occupies the compact category, while the G33 Gen4 is the subcompact model. This gives the G31 a distinctive place within Glock’s lineup.

In this complete guide, we’ll examine the Glock 31 Gen4 .357 SIG, including its design, specifications, Gen4 features, caliber, historical pricing information, maintenance considerations, comparisons, common questions, and what to understand when researching terms such as glock 31 for sale, glock 31 357, and glock 31gen4 for sale.

Glock 31 Gen 4 Features, Specifications and Design

The glock 31 gen 4 was developed as a full-size .357 SIG pistol. Glock describes the model as offering high muzzle velocity and precision while maintaining a lightweight construction and substantial magazine capacity. Its Gen4 configuration adds ergonomic features that distinguish it from earlier generations.

One of the most important Gen4 features is the Modular Backstrap System. This allows the grip configuration to be adjusted with interchangeable backstraps, providing more flexibility for different hand sizes. Glock also equipped the Gen4 model with a reversible magazine catch, making the control configuration suitable for both left- and right-handed users.

Glock 31 Gen 4 Technical Specifications

These specifications are from Glock’s official G31 Gen4 product information. Glock notes that technical specifications are subject to change.

The dimensions demonstrate that the G31 Gen4 is a full-size pistol rather than a compact or subcompact design. Its 4.49-inch barrel and 6.50-inch polymer sight radius are consistent with its larger overall configuration.

Understanding the Glock 31 357 SIG Cartridge

The Glock 31 357 SIG designation refers to the G31 chambered in .357 SIG. Glock’s historical buyer’s guides describe its .357 cartridge group as being based on the .40-caliber case and using a bottleneck configuration. The company’s documentation also identifies the G31 Gen4, G32 Gen4, and G33 Gen4 as members of this .357 group.

The .357 SIG cartridge should not be confused with .357 Magnum. Although both use “.357” in their names, they are different cartridges designed for different firearm platforms.

The bottleneck configuration is one of the defining characteristics of .357 SIG. Glock’s historical documentation specifically describes the cartridge as being based on the .40-caliber case and necked down for a .357-caliber projectile.

For anyone researching glock 31 357, understanding this distinction is important. The G31 is a semi-automatic pistol chambered for .357 SIG, not a revolver chambered for .357 Magnum.

Glock 31 Gen 4 Safe Action System

The G31 Gen4 uses Glock’s Safe Action system. According to Glock, this system incorporates three passive mechanical safeties that operate independently and automatically. The safeties re-engage when the trigger is released.

This system is part of the standard design philosophy across Glock’s pistol lineup. Rather than relying on a manually operated external safety lever, the Safe Action system incorporates safety mechanisms directly into the firing-control system.

For technical researchers, this is an important part of understanding the Glock 31 Gen 4 because it distinguishes the platform’s operating design from pistols that use manually activated external safeties.

Gen4 Ergonomics

The Gen4 generation introduced several ergonomic changes that are especially relevant to the G31.

The Modular Backstrap System allows the grip configuration to be changed. Glock specifically states that the system makes it possible to customize the grip for different hand sizes. The reversible magazine catch provides another level of user flexibility.

These features do not change the basic identity of the G31. It remains a full-size .357 SIG pistol with a 4.49-inch barrel and standard 15-round magazine capacity.

Instead, the Gen4 updates focus significantly on ergonomics and user interface.

Glock 31 Gen 4 Performance, Size and Comparisons

The Glock 31 Gen 4 occupies the full-size position in Glock’s .357 SIG family. This makes its dimensions an important part of the overall design.

Its 4.49-inch barrel is longer than the 4.02-inch barrel found on the G32 and the 3.43-inch barrel used by the G33 Gen4. Glock also lists the G31 Gen4 with a 15-round standard magazine, compared with 13 rounds for the G32 and 9 rounds for the G33 Gen4.

Glock 31 Gen 4 vs Glock 32

The Glock 32 is the compact counterpart to the G31. Glock lists the G32 with a 4.02-inch barrel, 7.36-inch overall length, 5.04-inch height, and unloaded weight of 21.87 ounces. Its standard magazine capacity is 13 rounds.

By comparison, the G31 Gen4 has a 4.49-inch barrel, 7.95-inch overall length, 5.47-inch height, and 23.28-ounce unloaded weight. The standard magazine capacity is 15 rounds.

The differences illustrate the intended positioning of the two pistols within the Glock family.

Glock 31 Gen 4 vs Glock 33 Gen4

The G33 Gen4 is the subcompact member of the .357 SIG family. Glock lists its barrel length at 3.43 inches and overall length at 6.42 inches, with an unloaded weight of 19.75 ounces and standard magazine capacity of 9 rounds.

The G31 Gen4 is therefore considerably larger.

The three-model comparison demonstrates how Glock uses the same general caliber family across different pistol sizes.

Glock 31 Gen 4 Reliability and Maintenance

Reliability is often a major part of discussions about Glock pistols, but reliability should not be separated from proper maintenance and inspection.

Glock recommends regular cleaning and lubrication and states that pistols should be cleaned after firing, before initial use, after exposure to environmental contaminants, and at least monthly when unused. Glock also recommends professional inspection for heavily used pistols and says replacement parts should be handled by a certified Glock armorer.

For a Glock 31 Gen 4, following the manufacturer’s maintenance information is more appropriate than relying on generic modification or maintenance advice found online.

A firearm’s condition can also have a major effect on reliability. This becomes especially important when evaluating an older or previously owned Gen4 model.

Common Considerations When Researching a Glock 31 Gen 4

People researching the G31 Gen4 commonly investigate several areas:

• Exact generation and model designation
• .357 SIG ammunition compatibility
• Barrel length and overall dimensions
• Magazine capacity
• Gen4 grip configuration
• Reversible magazine catch
• Overall firearm condition
• Historical versus current pricing
• Availability of factory documentation
• Maintenance history
• Applicable state and local regulations

These factors are particularly relevant when researching a glock 31 for sale, because listings can vary significantly in age, condition, configuration, and included components.

Glock 31 Gen 4 Price, Availability and Market Information

The word price requires some context when discussing the Glock 31 Gen4. Firearm pricing can vary according to market conditions, location, condition, inventory, taxes, transfer requirements, and whether a particular firearm is new or previously owned.

Historical Glock documentation provides useful reference points. Glock’s 2023 Buyer’s Guide listed an MSRP of $599 for the G31 Gen4. This is a historical manufacturer-listed price and should not be interpreted as the current retail price.

The same $599 MSRP appears in Glock’s 2021 Buyer’s Guide for the G31 Gen4.

This distinction is important for SEO content targeting glock 31 for sale. A historical MSRP is useful for understanding the model’s past pricing but does not establish what a firearm should cost today.

What to Consider When Seeing “Glock 31 for Sale”

The phrase glock 31 for sale is a common search query used by people researching the model and its availability.

When evaluating information associated with such a search, it is useful to distinguish between:

• New and used examples
• Gen3 and Gen4 models
• Different included accessories
• Factory configuration and aftermarket modifications
• Seller location
• Applicable state restrictions
• Transfer requirements
• Condition and maintenance history

The exact model should always be verified from the firearm’s documentation rather than relying solely on a listing title.

The phrase glock 31gen4 for sale may also appear in online searches without spaces between the model and generation. It generally refers to listings or availability information for the Gen4 version of the G31.

Historical Price vs Current Price

Historical manufacturer pricing should not be presented as current pricing.

For example, Glock’s 2023 Buyer’s Guide recorded $599 as the G31 Gen4 MSRP.

A current price can be different because of market conditions and changes in availability. Used examples can also have different values depending on condition, included magazines or accessories, production details, and local regulations.

For that reason, anyone researching the Glock 31 Gen 4 price should verify current information separately from historical specifications.

Glock 31 Gen4 and Legal Considerations

Firearm laws vary by state and locality. Magazine capacity rules, transfer procedures, purchasing requirements, and other restrictions may differ depending on where the firearm is located.

This is particularly important for people using search terms such as glock 31 for sale. Availability in one jurisdiction does not necessarily mean the same configuration can be transferred or possessed under the same conditions elsewhere.

Official state and local government resources should be consulted for current requirements.

Glock 31 Gen4 Frequently Asked Questions

What caliber is the Glock 31 Gen 4?

The Glock 31 Gen 4 is chambered in .357 SIG. Glock’s official technical data identifies the caliber as .357 and describes the model as a .357 SIG pistol.

What is the Glock 31 Gen 4 magazine capacity?

Glock lists a 15-round standard magazine capacity for the G31 Gen4, with 10- and 16-round options also listed. Magazine availability and lawful capacity depend on applicable regulations.

How long is the Glock 31 Gen 4?

The G31 Gen4 has an overall length of 7.95 inches and a barrel length of 4.49 inches.

How much does the Glock 31 Gen 4 weigh?

Glock lists the unloaded G31 Gen4 at 23.28 ounces. With an empty magazine it weighs 26.10 ounces, while the manufacturer’s listed loaded weight is approximately 33.16 ounces.

What makes the Glock 31 Gen 4 different from the earlier G31?

The Gen4 version includes features such as the Modular Backstrap System and reversible magazine catch. Glock specifically identifies these as features of the G31 Gen4.

Is .357 SIG the same as .357 Magnum?

No. .357 SIG and .357 Magnum are different cartridges. The G31 Gen4 is chambered for .357 SIG. Glock’s historical documentation describes the .357 cartridge as being based on the .40-caliber case with a bottleneck configuration.

What does “Glock 31 357” mean?

The search phrase glock 31 357 generally refers to the Glock 31 chambered in .357 SIG. The more precise designation is Glock 31 .357 SIG.

Is the Glock 31 Gen4 a full-size pistol?

Yes. The G31 Gen4 is the full-size model in Glock’s .357 SIG family. The G32 is the compact model, while the G33 Gen4 is the subcompact model.

What does “Glock 31gen4 for sale” mean?

Glock 31gen4 for sale is a search phrase referring to availability or listings for the Gen4 version of the Glock 31. Actual availability, pricing, configuration, and transfer requirements vary according to the seller and applicable laws.

Does Glock still provide information about the G31 Gen4?

Yes. Glock currently maintains an official G31 Gen4 product page containing specifications and product information. Glock also provides downloadable owner materials and buyer guides through its website.

How should a Glock 31 Gen4 be maintained?

Glock recommends regular cleaning and lubrication according to the owner’s manual. The manufacturer also recommends professional inspection for heavily used pistols and says replacement parts should be installed by a certified Glock armorer.

Final Review of the Glock 31 Gen 4

The Glock 31 Gen 4 is a full-size .357 SIG pistol distinguished by its 4.49-inch barrel, 15-round standard magazine capacity, Safe Action system, and Gen4 ergonomic features. Glock lists the model at 7.95 inches long, 5.47 inches high, 1.26 inches wide, and 23.28 ounces unloaded.

For readers researching the glock 31 gen 4, the most important point is that the model combines the larger dimensions of a full-size Glock with the characteristics of the .357 SIG cartridge. Its Gen4 configuration adds the Modular Backstrap System and reversible magazine catch, providing additional flexibility compared with earlier-generation versions.

The Glock 31 357 SIG platform also fits into a broader family that includes the compact G32 and subcompact G33 Gen4. The differences in barrel length, dimensions, weight, and magazine capacity help explain the role of each model within the lineup.

Historical pricing provides useful context, with Glock’s 2023 Buyer’s Guide listing a $599 MSRP for the G31 Gen4, but that figure should not be confused with current market pricing.

Whether someone encounters the search phrases glock 31 for sale, glock 31 357, or glock 31gen4 for sale, the key specifications remain the same starting point for understanding the model. Current availability, pricing, condition, and legal requirements should always be verified separately.

Overall, the Glock 31 Gen4 represents a notable chapter in Glock’s .357 SIG lineup. Its full-size dimensions, Gen4 ergonomics, documented specifications, and distinctive cartridge make it a model worth understanding for collectors, researchers, and firearm enthusiasts interested in Glock’s history and product range.