Glock 31 Gen 4 For Sale – Complete Buyer’s Guide, Review, Price & Accessories

The Glock 31 Gen 4 is one of the most powerful and reliable full-size pistols in Glock’s lineup. Chambered in the high-velocity .357 SIG cartridge, this firearm combines outstanding stopping power with Glock’s legendary dependability. Whether you are a law enforcement professional, firearm enthusiast, collector, or someone searching for a high-performance defensive handgun, the Glock 31 Gen 4 remains a top-tier option.

In this complete guide, we’ll cover everything you need to know about the Glock 31 Gen4 .357SIG, including performance, pricing, accessories, holsters, extended magazines, upgrades, common problems, and frequently asked questions.

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Glock 31 Gen4 .357SIG Overview

The Glock 31 Gen4 .357SIG is a striker-fired semi-automatic pistol designed for shooters who want speed, power, and reliability in a duty-sized handgun.

Built on Glock’s proven full-size platform, the Gen 4 version introduced several ergonomic and performance upgrades over previous generations.

Key Specifications

Feature	Details
Model	Glock 31 Gen 4
Caliber	.357 SIG
Capacity	15+1
Barrel Length	4.49 Inches
Overall Length	8.03 Inches
Weight (Unloaded)	Approx. 26 oz
Action	Striker-Fired
Frame Material	Polymer
Sights	Glock Factory Sights

The Glock 31 Gen 4 delivers a combination of power and magazine capacity rarely found in full-size handguns.

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Why Choose the Glock 31 Gen 4?

Many firearm enthusiasts continue searching for a glock 31 gen 4 for sale because of its impressive ballistic performance and dependable design.

High Velocity Performance

The .357 SIG cartridge is famous for producing exceptional muzzle velocity and flat trajectories. This makes the Glock 31 particularly effective for defensive applications.

Proven Glock Reliability

Glock pistols are known worldwide for reliability under extreme conditions. The Glock 31 Gen 4 continues that tradition.

Enhanced Gen 4 Ergonomics

Compared to earlier generations, the Gen 4 includes:

• Interchangeable backstraps
• Improved grip texture
• Dual recoil spring assembly
• Larger reversible magazine release

These improvements help increase comfort and recoil control.

Duty-Ready Design

The Glock 31 was trusted by numerous law enforcement agencies because of its power and reliability.

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Glock 31 Gen 4 Review

A detailed glock 31 gen 4 review reveals why this pistol remains highly respected among handgun enthusiasts.

Accuracy

The Glock 31 Gen 4 is extremely accurate for a service pistol. The .357 SIG round travels at high speed, creating a flatter shooting experience compared to many handgun calibers.

Shooters often report excellent grouping at medium and longer handgun distances.

Recoil Management

Although .357 SIG produces snappier recoil than 9mm, the Gen 4 dual recoil spring system significantly improves recoil management.

The upgraded grip texture also enhances control during rapid shooting.

Trigger Performance

The Glock Gen 4 trigger provides:

• Consistent pull weight
• Fast reset
• Reliable operation

While many shooters upgrade triggers for competition use, the factory setup performs very well for defensive shooting.

Ergonomics

The Gen 4’s modular backstrap system allows shooters to customize grip size for improved comfort.

This is one of the major improvements over the Gen 3 model.

Reliability

One of the strongest aspects of the Glock 31 Gen 4 is its outstanding reliability. The pistol performs consistently even after thousands of rounds.

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Glock 31 Gen 4 Price Guide

The glock 31 gen 4 price depends on factors such as condition, included accessories, and market demand.

Average Glock 31 Gen 4 Cost

Condition	Estimated Price
New	$600 – $750
Used	$450 – $650
Police Trade-In	$400 – $550

The glock 31 gen 4 cost may vary based on:

• Night sights
• Extra magazines
• Optic-ready slide cuts
• Upgraded triggers
• Custom finishes

Because .357 SIG pistols are less common than 9mm Glocks, availability can sometimes affect pricing.

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Glock 31 Gen 4 Slide Features

The glock 31 gen 4 slide is built for durability and dependable performance.

Durable Finish

The slide includes Glock’s corrosion-resistant treatment designed for long-term use.

Easy Maintenance

Field stripping and cleaning the slide is fast and simple.

Optic Compatibility

Many aftermarket companies now offer optic-ready slide modifications for red dot sights.

Strong Aftermarket Support

Shooters can customize their Glock 31 slide with:

• Ported slides
• Custom coatings
• Window cuts
• Suppressor-height sights

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Glock 31 Gen 4 Accessories

There are many popular glock 31 gen 4 accessories available for customization and performance upgrades.

Night Sights

Night sights improve low-light target acquisition.

Popular options include:

• Trijicon HD
• AmeriGlo
• XS Sights

Weapon Lights

Tactical lights improve home defense capability.

Popular lights include:

• Streamlight TLR-1
• SureFire X300

Grip Enhancements

Many shooters add:

• Talon grips
• Stippling
• Grip sleeves

for better control.

Red Dot Optics

Red dots improve target acquisition speed and accuracy.

Extended Controls

Popular upgrades include:

• Extended slide release
• Extended magazine release
• Enhanced takedown levers

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Glock 31 Gen 4 Extended Magazine Options

A glock 31 gen 4 extended magazine increases ammunition capacity for range training or duty applications.

Popular Extended Magazine Choices

Capacity	Purpose
17 Rounds	Standard Extended
22 Rounds	Tactical Use
31 Rounds	Range Training

Many extended magazines designed for Glock .40 caliber platforms also work with the Glock 31.

Reliable magazine manufacturers include:

• Glock OEM
• Magpul
• ETS

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Glock 31 Gen 4 Holster Options

Choosing the right glock 31 gen 4 holster is essential for comfort and accessibility.

Inside-the-Waistband (IWB)

Best for concealed carry.

Popular materials include:

• Kydex
• Hybrid leather
• Polymer

Outside-the-Waistband (OWB)

Ideal for:

• Duty use
• Open carry
• Range shooting

Tactical Holsters

Designed for weapon lights and retention systems.

Popular Holster Brands

• Safariland
• Alien Gear
• Blackhawk
• Vedder Holsters

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Glock 31 Gen 4 Problems

Although highly reliable, some owners report occasional glock 31 gen 4 problems.

Expensive Ammunition

The biggest drawback of .357 SIG is ammunition cost.

Increased Muzzle Blast

Shooters often notice:

• Loud report
• Significant muzzle flash

especially indoors.

Snappy Recoil

The recoil is sharper than 9mm, which may challenge newer shooters.

Ammo Availability

Not all stores consistently stock .357 SIG ammunition.

Wear on Components

High-pressure calibers can create increased wear over time if maintenance is neglected.

Proper cleaning and spring replacement usually prevent issues.

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Glock 31 Gen 4 vs Other Glock Models

Glock 31 Gen 4 vs Glock 17 Gen 4

Feature	Glock 31	Glock 17
Caliber	.357 SIG	9mm
Recoil	Sharper	Softer
Velocity	Higher	Moderate
Ammo Cost	Higher	Lower
Capacity	15	17

The Glock 17 is more affordable for frequent training, while the Glock 31 offers greater ballistic performance.

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Glock 31 Gen 4 vs Glock 22 Gen 4

The Glock 22 fires .40 S&W while the Glock 31 uses .357 SIG.

The Glock 31 generally offers:

• Flatter trajectory
• Faster velocity
• Better feeding reliability

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Best Uses for the Glock 31 Gen 4

Home Defense

The Glock 31 provides excellent stopping power and dependable performance.

Law Enforcement

Its duty-sized design and high-performance caliber made it popular among police agencies.

Range Training

Shooters who enjoy high-velocity handguns appreciate the .357 SIG shooting experience.

Firearm Collection

The Glock 31 Gen 4 remains a unique addition to Glock collections.

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Ammunition Recommendations

Choosing quality ammunition is critical for maximizing performance.

Defensive Ammunition

Popular self-defense loads include:

• Speer Gold Dot
• Federal HST
• Winchester Ranger-T

Range Ammunition

Full metal jacket loads are ideal for practice sessions.

Avoid low-quality reloads because .357 SIG operates at higher pressures.

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Maintenance Tips

Proper maintenance keeps the Glock 31 Gen 4 functioning reliably.

Cleaning

Clean the pistol regularly after range sessions.

Lubrication

Apply small amounts of lubrication to key moving parts.

Recoil Spring Replacement

The dual recoil spring should be replaced periodically.

Magazine Maintenance

Inspect magazines for worn springs or damaged feed lips.

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Buying a Glock 31 Gen 4 Online

When searching for a glock 31 gen 4 for sale, buyers should carefully compare options.

Verify Seller Reputation

Only buy from trusted firearm dealers.

Review Included Accessories

Some listings include:

• Night sights
• Extra magazines
• Holsters
• Weapon lights

Compare Pricing

Checking multiple retailers helps identify fair pricing.

Understand Local Laws

Always comply with federal, state, and local firearm laws.

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Is the Glock 31 Gen 4 Worth Buying?

The Glock 31 Gen 4 remains one of the best full-size .357 SIG pistols available.

Its advantages include:

• Excellent velocity
• Strong stopping power
• Reliable operation
• Durable construction
• Customization potential

Shooters who appreciate high-performance defensive calibers often consider the Glock 31 Gen 4 an outstanding choice.

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FAQs About Glock 31 Gen 4

What caliber is the Glock 31 Gen 4?

The Glock 31 Gen 4 is chambered in .357 SIG.

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What is the average Glock 31 Gen 4 price?

Most new models sell between $600 and $750 depending on accessories and condition.

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Is the Glock 31 Gen 4 reliable?

Yes. The Glock 31 Gen 4 is known for exceptional reliability and durability.

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What are common Glock 31 Gen 4 problems?

The most common concerns include expensive ammunition, loud muzzle blast, and sharper recoil.

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Can you use extended magazines with the Glock 31 Gen 4?

Yes. Many Glock-compatible extended magazines work well with the Glock 31 platform.

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What is the best Glock 31 Gen 4 holster?

The best holster depends on intended use. Popular choices include Kydex IWB and Safariland OWB holsters.

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Is .357 SIG stronger than 9mm?

Generally, .357 SIG produces higher velocity and greater energy than standard 9mm ammunition.

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Can the Glock 31 Gen 4 be customized?

Yes. There is strong aftermarket support for slides, triggers, sights, lights, and accessories.

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Is the Glock 31 Gen 4 good for concealed carry?

While possible, its full-size frame may feel large for some concealed carry users.

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Final Thoughts

The glock 31 gen 4 continues to stand out as a reliable, high-performance handgun chambered in .357 SIG. Combining Glock durability with powerful ballistic capability, it remains a favorite among enthusiasts, professionals, and collectors.

Whether you are researching the glock 31 gen 4 price, searching for the best glock 31 gen 4 accessories, comparing glock 31 gen 4 extended magazine options, looking for a dependable glock 31 gen 4 holster, or reading a detailed glock 31 gen 4 review, this pistol remains an excellent option in today’s firearm market.

For shooters seeking speed, power, and proven Glock reliability, the Glock 31 Gen 4 is absolutely worth considering.