Glock 27 Review – Compact .40 S&W Power You Can Trust

The Glock 27 is a .40 S&W subcompact striker-fired pistol introduced in the mid-1990s and continuously refined through Gen3 → Gen4 → Gen5 updates. With a ~3.42" barrel, a compact 6.49" overall footprint, and a factory double-stack magazine (standard 9 rounds) it delivers pocket-friendly concealability while retaining meaningful stopping power.

The platform uses Glock’s Safe Action® system, polymer frame construction, and (on later gens) a dual recoil spring assembly and nDLC slide finish — a pragmatic balance of durability, simplicity, and aftermarket flexibility that keeps the G27 relevant for defensive carry and backup roles.

Credits

What is the Glock 27 and why does it matter?

The Glock 27 is Glock’s answer for shooters wanting .40 S&W power in a truly compact package. It matters because it compresses service-caliber ballistics into a subcompact footprint while leaning on Glock’s proven reliability and a huge aftermarket.

Manufacturer background and lineage

Glock GmbH (Austria) built its reputation on simple, robust striker-fired pistols. The G27 was introduced in the 1990s as a companion to Glock’s compact and full-size .40 pistols. Over the years it received incremental improvements across generations — improved ergonomics and recoil systems in Gen4, and refined grip texture, ambidextrous controls, and nDLC finishes in Gen5.

Intended market and purpose

Primarily designed for concealed carry and off-duty/back-up duty use, the G27 also appeals to users who want the perceived terminal advantages of .40 S&W in a discreet package. It’s a defensive tool first — not a target or hunting firearm.

What are the Glock 27 specifications?

Core dimensions and weights

• Caliber: .40 S&W

• Barrel length: ≈ 3.42 in (87 mm)

• Overall length: ≈ 6.49 in (165 mm)

• Height (with magazine): ≈ 4.17 in (106 mm)

• Width: ≈ 1.26 in (32 mm)

• Unloaded weight: ≈ 550 g (19.4 oz)

• Loaded weight: ≈ 750 g (26.46 oz) (depending on magazine and load)

Capacity and magazines

• Standard capacity: 9 rounds (.40 S&W)

• Compatible options: 10, 13, 14, 15, 16 and extended 22-round magazines are available for increased capacity and improved grip purchase.

Materials & finish

• Frame: High-strength polymer with textured grip.

• Slide: Steel with corrosion-resistant finishes (nDLC on many Gen5 models).

• Internal: Dual recoil spring (Gen4/Gen5) for smoother cycling; Safe Action® internal safety trio.

How is the Glock 27 designed and built?

Frame and slide materials

The G27 uses a reinforced polymer frame for weight savings and durability; the slide is machined steel with corrosion-resistant finishes on later generations. The overall build favors low maintenance and longevity.

Ergonomics, grip texture, and angle

The grip is intentionally short to keep the profile minimal. That shortness improves concealability but reduces purchase for larger hands — a common tradeoff for subcompacts. Gen4 introduced interchangeable backstraps to tailor circumference, and Gen5 refined the texture for better purchase without overly aggressive checkering.

Controls: safety, mag release, slide stop

There is no external manual safety; Glock relies on its internal Safe Action® system (trigger safety, firing-pin safety, drop safety). Magazine release is reversible on later gens to suit left-hand shooters. Gen5 models offer ambidextrous slide stop levers.

Accessory compatibility

The G27 includes an accessory rail for lights and lasers. While optics-ready factory cuts are rare on stock G27s, aftermarket slides and gunsmithing options exist to fit micro-red dots. Threaded-barrel options are available through some variants or aftermarket conversions if suppressor use is desired.

What variants and model differences exist across Glock 27 generations?

Generational differences (Gen1 → Gen5)

• Gen3: Original subcompact form — proven and familiar.

• Gen4: Added modular backstraps, rougher grip texture, and dual recoil spring assembly for reduced felt recoil and improved durability.

• Gen5: nDLC slide finishes, ambidextrous controls, improved barrel rifling, and refined grip texture. Each generation refines ergonomics and cycling reliability.

Size comparisons with other Glock models

Compared to the G26 (9mm double-stack) and G19 (compact 9mm), the G27 is similar in footprint but chambered for .40 S&W. It’s narrower than full-size service pistols but wider than single-stack subcompacts.

Threaded barrels and optics options

Some aftermarket and special variants offer threaded barrels; optics cuts are typically aftermarket as well. These modifications expand the platform’s utility but require professional fitting.

Similar guns from other manufacturers

Comparable subcompact .40s historically include models from Smith & Wesson, Sig Sauer, and others. Most modern trends, however, favor 9mm for reduced recoil and broader ammo selection — something to weigh when comparing the G27 to newer subcompact options.

How does the Glock 27 perform in practical shooting?

Accuracy and real-world results

Expect competent defensive accuracy from the G27. With deliberate shooting groupings at 7–25 yards are reasonable; the short sight radius of a 3.42" barrel limits extreme precision but does not degrade practical accuracy inside typical defensive ranges.

Recoil management and rapid fire

.40 S&W in a subcompact frame produces a sharper, snappier recoil impulse than 9mm equivalents. The Gen4/Gen5 dual recoil springs help, but muzzle flip and felt recoil are still more noticeable. Controlled technique and two-hand grips or extended magazines mitigate these effects.

Reliability and round counts

Community and range tests consistently report excellent reliability — the G27 reliably cycles common FMJ and defensive loads across high round counts. Failures are more likely linked to weak magazines, poor maintenance, or malformed ammo rather than inherent design flaws.

Trigger quality, travel, and reset

The stock Glock trigger delivers predictable takeup and break with a modest reset. It’s functional for defensive shooting; shooters seeking a crisper wall and lighter break commonly upgrade trigger components or use aftermarket connectors.

What ammunition works best in the Glock 27?

Ideal grain weights and performance

Typical effective grain weights are 165–180 gr for defensive .40 loads. These heavier bullets deliver good penetration in short barrels, while 155 gr is lighter and snappier.

Defensive loads, target rounds, and +P use

Premium hollow-point defensive loads from reputable manufacturers are recommended for carry. The G27 will handle +P loads but expect increased wear and sharper recoil; use +P sparingly and follow ammunition & manufacturer guidance.

Feeding and extraction notes

No systemic feeding issues exist with modern Glock 27s in good configuration. Magazine condition and using quality factory or well-tested aftermarket magazines reduce the chance of feed/extraction problems.

How suitable is the Glock 27 for various use cases?

Is the Glock 27 good for concealed/self-defense?

Yes. The G27’s compact size and .40 stopping power make it a solid choice for deep concealment and backup carry. The tradeoff is increased recoil and the need to train for rapid follow-ups.

Is the Glock 27 suitable for home defense?

It’s serviceable; magazines with higher capacity and good sights help. Many owners prefer a larger pistol for primary home defense, using the G27 as a secondary or bedroom pistol where concealability is not a priority.

Is the Glock 27 viable for competition (IDPA/USPSA)?

Generally not the first pick: short sight radius and snappier recoil reduce speed for competitive strings. However, in compact or production divisions where allowed, a trained shooter can be competitive.

Is the Glock 27 useful for hunting or outdoors?

Not optimized for hunting — its role is defensive. It can be a backup in outdoor situations but is not a primary field firearm.

Is the Glock 27 a range toy or professional workhorse?

Many professionals and concealed carriers treat the G27 as a dependable workhorse backup. User sentiment often voices respect for its reliability: “It’s small, it’s mean, and it always goes bang when I need it.”

What are the best holsters for the Glock 27?

Below are practical holster choices for a Glock 27 holster. These holsters are polymer (Boltaron) constructions designed to retain shape and provide consistent retention — durable, lightweight, and suited to concealment needs.

Cloak Tuck 3.5 IWB Holster

A Cloak Tuck 3.5 Glock 27 holster offers deep-concealment IWB carry with a slim wing to reduce printing. It allows a full firing grip at draw while keeping ride height low for concealment.

Belt Holster

A belt Glock 27 holster secures the pistol to a sturdy belt for stable, repeatable positioning. It’s ideal for home or range use where concealment is less critical.

OWB Paddle Holster

An OWB paddle Glock 27 holster offers fast don/doff and is comfortable for range sessions or open carry. The paddle distributes weight and keeps the pistol accessible.

Swivel Drop Leg Holster

A swivel drop leg Glock 27 holster places the pistol low and accessible for tactical or vehicle operations. Adjustable cant improves draw ergonomics for various rigs.

Chest Holster

A chest Glock 27 holster suits cold weather, vehicle, or layered carry when belt access is limited. It keeps the pistol stable and protected during movement.

Hook & Loop Holster

A hook & loop Glock 27 holster is a soft, adaptable option for pack carry or range storage. It trades immediate speed for simplicity and concealment flexibility.

Belly Band

A belly band Glock 27 holster works for gym or temporary carry scenarios, offering flexible positioning. Comfort and retention vary; test for personal fit and retention.

Appendix

An appendix Glock 27 holster gives arguably the fastest hand-to-pistol path for many carriers but requires careful setup for safety and comfort. For a short pistol like the G27, appendix carry can be excellent when properly positioned.

What are the Glock 27 pros and cons?

Pros

• Compact .40 S&W power in a highly concealable package.

• Proven Glock reliability across generations and high round counts.

• Wide aftermarket support (magazines, sights, holsters, triggers).

• Modular backstraps (Gen4+) and ambidextrous controls (Gen5) improve adaptability.

• Accessory rail for lights/lasers.

Cons

• Sharper, snappier recoil compared to 9mm subcompacts — more demanding to shoot rapidly.

• Short grip can be uncomfortable for larger hands without magazine extensions.

• Factory sights are basic; many users upgrade.

• Not as forgiving for new shooters sensitive to recoil.

• Optics and suppressor setups often require aftermarket work.

What is the final verdict on the Glock 27?

Recommendation by user type

The Glock 27 is best for carriers who want .40 S&W power with a compact footprint: off-duty officers, experienced defensive carriers, and owners who accept a bit of extra recoil in exchange for stopping power. It’s less ideal for recoil-sensitive shooters or those who prioritize economy of follow-ups.

Value for money and long-term ownership

Value is strong: the G27 delivers decades of proven durability, wide parts availability, and high resale value. Long-term ownership is straightforward thanks to Glock’s ubiquitous parts and magazines.

Upgrade path and parts support

A healthy aftermarket exists for sights, extended magazines, springs, and trigger components. Upgrades can meaningfully improve ergonomics and shootability, making the G27 adaptable to a broad range of users.

Final thought: The Glock 27 remains a practical and dependable subcompact pistol for users who want .40 caliber performance in a discreet package. With training and the right magazines, it’s an effective defensive tool that has earned its place in many concealed-carry arsenals.