Best Outdoor Handguns · #6
G40 Gen4 MOS (10 mm)
Glock
Reader rating
Rate it and you move it. Community ratings re-rank this product inside its Top 10 list.
Expert-picked, reader-ranked. Our editors choose the products and the launch order; member star ratings move picks up or down over time.
Six-inch barrel wrings full velocity from hard-cast 10 mm loads. The thinking person's bear gun.
Pros
- Extended 6-inch barrel maximizes 10mm velocity and penetration
- MOS system for easy red dot sight mounting
- High magazine capacity for a powerful cartridge
- Legendary Glock reliability and corrosion resistance
- Manageable recoil for its power level
Cons
- Large and heavy for a polymer-framed pistol
- Trigger feel is utilitarian, not refined
- Can be challenging to conceal carry
Best uses
- Bear defense
- Hunting backup
- Hog hunting
- Backcountry protection
Specifications
- Caliber
- 10mm Auto
- Barrel Length
- 6.02 inches
- Capacity
- 15+1 rounds
- Optic Ready
- MOS (Modular Optic System)
- Frame Material
- Polymer
- Overall Length
- 9.49 inches
Pricing
We don't publish a price we haven't verified. The retailer links below open the live listing for this exact model.
Best for
Bear defense, Hunting backup, Hog hunting, Backcountry protection
Where to buy the G40 Gen4 MOS (10 mm)
We don't have a direct Amazon listing on file yet — this opens an Amazon search for the exact make and model.
Some links are affiliate links. Buying through them supports our testing at no extra cost to you.
The Glock 40 Gen4 MOS in 10mm represents a pragmatic choice for backcountry protection, particularly when dealing with larger, potentially dangerous game. Its extended 6-inch barrel is the key differentiator here, allowing the potent 10mm cartridge to achieve its full ballistic potential, especially with heavier, hard-cast loads designed for deep penetration. This isn't a concealed carry piece; it's a dedicated outdoor tool, built to handle the rigors of the wilderness and offer a significant deterrent when other options aren't practical or permitted. The MOS (Modular Optic System) feature further enhances its utility, providing a straightforward way to mount a red dot sight, which can drastically improve accuracy and target acquisition in stressful situations. While not a lightweight, its polymer frame keeps the overall weight manageable for belt or chest carry over long distances. It's a no-nonsense sidearm for those who prioritize raw power and reliability in a trail-ready package. This pistol is for the individual who understands that cartridge velocity is crucial for terminal performance against substantial threats. It's not about being flashy; it's about delivering predictable, effective results when stakes are high. The Gen4 ergonomics, with its interchangeable backstraps, allows for a more customized fit than earlier generations, which is important when handling a powerful cartridge like the 10mm. While Glocks are often critiqued for their uninspired triggers, the G40's trigger is entirely serviceable for its intended purpose: a defensive and hunting tool where precision is less about match-grade feel and more about consistent, reliable function. This pistol shines in environments where robustness and power trump sleek design or absolute portability.
Who It's For
The Glock 40 Gen4 MOS is squarely aimed at serious outdoorsmen, hunters, and those who frequent areas with large predatory animals. It's the choice for someone who needs a reliable, powerful sidearm for bear defense, hog hunting, or as a backup while pursuing bigger game with a rifle. It's not a beginner's pistol due to its recoil, nor is it a discreet option for urban environments. This is a tool for the wilderness, designed for open carry where its size and presence are not a hindrance but a reassurance. Its 10mm chambering, especially with quality hard-cast ammunition, provides a level of penetration and energy that many other handgun calibers simply cannot match, making it a responsible choice for those venturing deep into wild country.
Materials and Construction
Like all Glocks, the G40 features a durable polymer frame and a Tenifer-treated steel slide and barrel. This combination provides exceptional corrosion resistance, which is critical for a firearm exposed to varied outdoor elements like rain, sweat, and dirt. The internal mechanisms are designed for simplicity and reliability, minimizing potential points of failure. The MOS system involves a series of adapter plates, allowing users to attach various red dot sights without needing custom machining. While not the most aesthetically refined firearm, its construction prioritizes function and ruggedness over cosmetic appeal, ensuring it can take a beating and keep running. This utilitarian design is a hallmark of the brand and a key factor in its widespread adoption by professionals and outdoor enthusiasts alike.
Real-World Performance
In the field, the G40 performs exactly as expected: reliably and powerfully. The longer barrel significantly increases muzzle velocity with 10mm loads, giving hard-cast bullets better penetration against thick hides and bone. Recoil is stout but manageable, especially with the added weight of the long slide and a full magazine. The modular optic system genuinely enhances its usability, making quick, precise shots much easier in dynamic situations or at longer handgun ranges. While the trigger isn't match-grade, it's consistent, which is more important for a defensive or hunting sidearm. It eats a wide variety of ammunition without complaint, from mild range loads to full-power hunting cartridges. It’s a workhorse, not a show pony, delivering consistent performance in conditions that might challenge lesser firearms.
Weight and Packability
At over 27 ounces unloaded, and considerably more with a full 15-round magazine and an optic, the Glock 40 is not light. Its 6-inch barrel also makes for a substantial overall length. This isn't a pistol that disappears on your hip. However, for a firearm offering its level of power and barrel length, the polymer frame does keep its weight respectable compared to all-steel alternatives. For wilderness carry, it often finds a home in a chest holster, allowing easy access and keeping it out of the way of a pack's hip belt. While its size demands a conscious decision about how to carry it, the trade-off for its ballistic performance and reliability is generally considered worthwhile by those who need its capabilities.
Durability and Alternatives
Glock's reputation for durability is well-earned, and the G40 is no exception. It's built to withstand abuse, neglect, and harsh environments. The Tenifer finish is highly resistant to corrosion and wear. Field-stripping is straightforward, making cleaning and maintenance simple even in primitive conditions. Comparable alternatives at a similar price point include other 10mm pistols like the Springfield XD-M Elite 4.5" OSP or the Smith & Wesson M&P 2.0 10mm, though neither offers the same 6-inch barrel length as the G40. For those seeking even greater power, revolver options like a Ruger Super Redhawk in .44 Magnum or .454 Casull are available, but typically come with increased weight, bulk, and lower capacity, while also being significantly more expensive. The G40 hits a sweet spot for many in terms of power, capacity, and cost.
How we chose
We started with a long list of best outdoor handguns that people actually buy, cut anything that could not clear our baseline for durability and field performance, then ranked the 10 that were left against the same criteria. Rankings are editorial. No brand pays for placement, and affiliate links never move a pick up or down.
- Real-world durability
- How the material, stitching, or steel holds up after a season of hard use — not how it looks new.
- Performance in bad conditions
- Wind, rain, cold, and grit are the test. Anything that only works on a nice day gets marked down.
- Weight and packability
- Every ounce has to earn its place in the pack, but not at the cost of something that fails in the field.
- Ease of use
- Setup, adjustment, and maintenance with cold hands, in the dark, without the manual.
- Value at its price point
- Compared against the closest competitors in the same tier, not against cheaper gear in a different class.
- Repairability and support
- Field-fixable design, available parts, and a warranty the maker actually honors.
G40 Gen4 MOS (10 mm) — frequently asked questions
- Is the G40 Gen4 MOS (10 mm) worth it?
- We rank it #6 in Best Outdoor Handguns. Six-inch barrel wrings full velocity from hard-cast 10 mm loads. The thinking person's bear gun.
- What is the G40 Gen4 MOS (10 mm) best for?
- Best for bear defense, hunting backup, hog hunting and backcountry protection. Standouts: extended 6-inch barrel maximizes 10mm velocity and penetration and mos system for easy red dot sight mounting.
- What are the downsides of the G40 Gen4 MOS (10 mm)?
- Large and heavy for a polymer-framed pistol, Trigger feel is utilitarian, not refined and Can be challenging to conceal carry.
- What are the key specs of the G40 Gen4 MOS (10 mm)?
- Caliber: 10mm Auto · Barrel Length: 6.02 inches · Capacity: 15+1 rounds · Optic Ready: MOS (Modular Optic System) · Frame Material: Polymer
- Who It's For?
- The Glock 40 Gen4 MOS is squarely aimed at serious outdoorsmen, hunters, and those who frequent areas with large predatory animals. It's the choice for someone who needs a reliable, powerful sidearm for bear defense, hog hunting, or as a backup while pursuing bigger game with a rifle.
- Materials and Construction — what should I know about the G40 Gen4 MOS (10 mm)?
- Like all Glocks, the G40 features a durable polymer frame and a Tenifer-treated steel slide and barrel. This combination provides exceptional corrosion resistance, which is critical for a firearm exposed to varied outdoor elements like rain, sweat, and dirt.
Compare side by side
Put the G40 Gen4 MOS (10 mm) against any other pick on this list — specs, price, pros, cons and reader ratings.