Glock 42 vs 43: Complete Size, Specs & Concealed Carry Comparison

The Glock 42 and Glock 43 represent two of the most popular concealed carry pistols on the market, but they serve different needs despite their similar compact designs. Both pistols share Glock's reputation for reliability and simplicity, yet they differ in key areas that can significantly impact a shooter's experience.

The main difference between the Glock 42 and 43 lies in their caliber: the 42 fires .380 ACP ammunition while the 43 chambers 9mm rounds, making the 43 more powerful but slightly larger. This caliber difference affects everything from recoil management to stopping power, with the Glock 42 being Glock's smallest and lightest pistol while the 43 offers enhanced firepower in a still-compact package.

Understanding which pistol better suits individual needs requires examining their dimensions, capacity, shootability, and concealment characteristics. The choice between these two models often comes down to whether a shooter prioritizes maximum concealability or prefers more stopping power while maintaining a compact profile.

Key Takeaways

• The Glock 42 fires .380 ACP and is smaller and lighter, while the Glock 43 chambers 9mm with more stopping power

• Both pistols excel at concealed carry but the 42 offers better concealability and the 43 provides superior ballistic performance

• The decision between these models depends on balancing size preferences against desired firepower for personal protection needs

Direct Comparison of Glock 42 vs 43

The Glock 42 and Glock 43 represent two distinct approaches to concealed carry pistol design. The 42 prioritizes ultimate concealability with its .380 caliber and lighter weight, while the 43 balances size with the proven stopping power of 9mm ammunition.

Key Differences in Purpose and Design

Glock designed these single-stack handgun models for different carry preferences and shooting abilities. The Glock 42 serves as the company's most compact option for deep concealment situations.

Its .380 ACP chambering produces less recoil than 9mm. This makes it easier for new shooters or those with hand strength limitations to control accurately.

The Glock 43 targets shooters who want maximum defensive capability in a small package. It chambers the widely available 9mm cartridge that law enforcement and military units prefer.

Design Philosophy:

• Glock 42: Maximum concealability and ease of shooting

• Glock 43: Balance of power and portability

The 43's slightly larger frame accommodates the longer 9mm cartridge. This results in enhanced stopping power while maintaining concealed carry suitability.

Both pistols use Glock's Safe Action trigger system. They feature the same reliable striker-fired mechanism that makes Glock pistols popular with concealed carry permit holders.

Side-by-Side Specifications

The dimensional differences between these models affect carrying comfort and shooting performance. The Glock 42 measures 5.94 inches in overall length compared to the Glock 43's 6.25 inches.

Physical Dimensions:

The weight difference of over 4 ounces becomes noticeable during extended carry periods. The Glock 42's lighter profile reduces printing through clothing.

Capacity and Caliber:

• Glock 42: 6+1 rounds of .380 ACP

• Glock 43: 6+1 rounds of 9mm (8+1 with extended magazines)

The 9mm cartridge in the Glock 43 delivers significantly more kinetic energy than .380 ACP. This translates to better penetration and expansion in defensive situations.

Carrying Experience and Concealability

Daily carry comfort varies between these two Glock models based on body type and clothing choices. The Glock 42's slimmer profile disappears more easily in pocket holsters and appendix carry positions.

The Glock 42 excels at discreet carry while the Glock 43 offers enhanced firepower. Pocket carry works better with the 42's lighter weight and smaller dimensions.

Concealment Advantages:

Glock 42:

• Lighter feel during extended wear

• Less printing in tight clothing

• Better for smaller body frames

• Ideal for ankle or pocket carry

Glock 43:

• More substantial grip for better control

• Higher capacity with extended magazines

• Superior ballistic performance

• Better for waistband carry

The 43's additional weight provides better recoil management during rapid fire. This helps maintain accuracy under stress when every shot counts.

Both single-stack handgun designs carry comfortably in quality holsters. The choice depends on whether maximum concealability or defensive capability takes priority for individual carry needs.

Caliber, Capacity, and Performance

The most significant differences between these pistols lie in their ammunition types and resulting capabilities. The Glock 43 fires 9mm rounds while the Glock 42 uses .380 ACP, creating distinct performance profiles for each firearm.

9mm vs .380 ACP Ballistics

The Glock 43 delivers higher muzzle energy and better ballistic performance compared to the .380 ACP chambering of the Glock 42. This translates to greater stopping power in defensive situations.

9mm Performance:

• Muzzle velocity: 1,150 fps (average)

• Muzzle energy: 350+ ft-lbs

• Better penetration through barriers

• More effective expansion with hollow points

.380 ACP Performance:

• Muzzle velocity: 950 fps (average)

• Muzzle energy: 200-250 ft-lbs

• Adequate for personal defense

• Less overpenetration risk

The 9mm round offers superior terminal ballistics. It maintains energy better at distance and provides more reliable expansion with defensive ammunition.

The .380 ACP remains effective for self-defense at close range. However, it lacks the penetration capability needed for certain threat scenarios.

Recoil and Shooting Experience

The Glock 42 produces slightly less recoil due to its lighter weight and smaller cartridge. This makes it more manageable for new shooters or those with limited hand strength.

The .380 ACP generates mild recoil impulse. Quick follow-up shots become easier to manage. The lighter recoil helps maintain sight alignment between shots.

The 9mm in the Glock 43 creates sharper recoil. The single-stack 9mm design concentrates more force into the shooter's hand. However, most shooters adapt quickly to this increased recoil.

Recoil Comparison:

• Glock 42: Softer, more controlled

• Glock 43: Snappy but manageable

• Recovery time: Similar for experienced shooters

• New shooter preference: Often favors .380 ACP

The grip size affects recoil management on both pistols. The Glock 43 provides slightly more surface area for control.

Magazine Capacity Differences

Both pistols use single-stack magazines that limit their capacity compared to double-stack designs. The capacity difference reflects the size variations between cartridges.

Standard Capacity:

• Glock 42: 6+1 rounds of .380 ACP

• Glock 43: 6+1 rounds of 9mm

Extended magazines increase capacity for both models. Aftermarket options provide additional rounds while maintaining reliability.

The Glock 43 magazines take up similar space despite the larger 9mm cartridge. Both pistols reload quickly with their slim magazine profiles.

Magazine compatibility differs between models. The Glock 43 magazines work with other Glock single-stack 9mm pistols in their lineup.

Carrying spare magazines becomes important with these lower capacities. The slim profile makes concealed magazine carry more practical than with thicker alternatives.

Size and Ergonomics

The Glock 42 and 43 differ significantly in their physical dimensions and handling characteristics. The Glock 42 is noticeably smaller than the Glock 43, while both guns feature single-stack magazine designs that enhance concealability.

Dimensions and Weight

The Glock 42 measures 5.94 inches in overall length and 4.13 inches in height. It weighs 13.76 ounces unloaded, making it one of the lightest .380 options available.

The Glock 43 is slightly larger at 6.26 inches long and 4.25 inches tall. It weighs approximately 17.95 ounces unloaded.

The Glock 43 is four ounces heavier when loaded. This weight difference affects how each single-stack handgun feels during extended carry periods.

Both pistols maintain a slim profile that aids concealment. The Glock 42's smaller size makes it easier to hide in pocket holsters or under lightweight clothing.

Grip, Comfort, and Handling

The Glock 42 features a shorter grip that accommodates smaller hands well. Its lightweight design reduces fatigue during extended shooting sessions but requires proper grip technique to manage recoil effectively.

The Glock 43 offers improved ergonomics with a thoughtfully contoured grip. The slightly larger frame provides better control and stability when firing.

Both single-stack handgun models use similar trigger systems and safety features. The Glock 43's additional grip length allows for a more secure hold during rapid fire sequences.

Shooters with larger hands typically prefer the Glock 43's grip dimensions. The extra surface area improves control without significantly impacting concealability.

The textured grip surfaces on both models provide adequate traction in various weather conditions. Neither pistol includes finger grooves, allowing for more universal hand compatibility.

Carry Methods and Practical Use

Both the Glock 42 and Glock 43 excel in different carry positions due to their size and weight differences. The choice of carry method often determines which pistol works better for daily concealed carry needs.

Inside-the-Waistband and Pocket Carry

The Glock 42 dominates in pocket carry situations due to its smaller frame and lighter weight. At just 13.76 ounces, it disappears easily in most pockets without creating obvious printing.

Inside-the-waistband carry works well for both models. The Glock 42's compact dimensions make it comfortable for appendix carry, especially for smaller-framed individuals.

The Glock 43 performs better in traditional IWB positions at 3 or 4 o'clock. Its slightly larger grip provides better purchase during the draw stroke.

Key IWB considerations:

• Glock 42: Better for appendix carry

• Glock 43: More stable in strong-side positions

• Both require quality holsters with good retention

Pocket carry favors the Glock 42 significantly. The Glock 43's dimensions often create uncomfortable bulk in most pants pockets.

Ankle Carry and Deep Concealment

Ankle carry suits the Glock 42 better due to its reduced weight and size. Extended periods of wear become more comfortable with the lighter pistol.

The Glock 42 works well for deep concealment situations where maximum discretion is required. Its profile allows for carry in positions that would be uncomfortable with larger pistols.

Deep concealment options:

• Ankle holsters

• Belly bands

• Shoulder holsters for lighter clothing

The Glock 43 can work for ankle carry but may cause fatigue during long wear periods. Its extra weight becomes noticeable after several hours.

Both pistols work well with belly band systems. The choice depends on comfort preferences and clothing styles.

Suitability for Different Body Types and Lifestyles

Smaller-framed individuals often prefer the Glock 42 for its manageable size and reduced printing. The pistol conceals easily under fitted clothing without creating obvious bulges.

Larger-framed carriers typically handle either pistol well but may prefer the Glock 43's enhanced grip surface. The slightly larger dimensions feel more natural in bigger hands.

Lifestyle considerations:

• Office workers: Glock 42 for dress clothes

• Active lifestyles: Glock 43 for better retention

• Hot climates: Glock 42 for minimal clothing

Professional environments favor the Glock 42's discretion. Business attire conceals the smaller pistol more effectively than the Glock 43.

Active individuals benefit from the Glock 43's more secure grip during physical activities. The larger contact surface provides better control during movement.

Model Variants, Upgrades, and Alternatives

The Glock 42 and 43 serve as entry points into a broader ecosystem of variants and customization options. The 43X and 43X MOS extend the original 43's capabilities, while aftermarket modifications can enhance performance and aesthetics.

Glock 43X and Glock 43X MOS

The Glock 43X represents a significant evolution from the standard 43. It features a longer grip that accommodates a 10-round magazine compared to the 43's 6-round capacity.

The extended grip improves control and reduces felt recoil. Many shooters find the additional grip length makes the pistol more comfortable during extended shooting sessions.

Key 43X improvements:

• Magazine capacity: 10 rounds vs 6 rounds

• Grip length: Extended for better control

• Same slide length: Maintains concealability

The Glock 43X MOS (Modular Optic System) takes customization further. It includes a mounting plate system for red dot optics.

The MOS version allows users to mount popular micro red dots like the Trijicon RMRcc or Holosun 507K. This upgrade significantly improves target acquisition speed and accuracy.

Aftermarket Customization

Both the 42 and 43 support extensive aftermarket modifications. Trigger upgrades remain the most popular enhancement among owners.

Popular upgrade categories:

• Triggers: Apex, Overwatch Precision, Timney

• Sights: Night sights, fiber optic, suppressor height

• Barrels: Threaded, match-grade, fluted designs

• Magazines: Extended capacity, +1/+2 extensions

Grip modifications include stippling, rubber sleeves, and grip tape. These improvements enhance control without significantly altering the pistol's profile.

Many owners install aftermarket barrels for improved accuracy or suppressor compatibility. Companies like Zaffiri Precision and Agency Arms offer premium barrel options.

Magazine extensions provide additional capacity without requiring frame modifications. These additions typically add 1-2 rounds while maintaining reliability.

Alternative Glock Models for Concealed Carry

The Glock 19 remains the gold standard for concealed carry among many users. It offers 15-round capacity in a compact package that many find manageable for daily carry.

Size comparison considerations:

• Glock 19: Larger but higher capacity

• Glock 26: Subcompact with 10-round magazines

• Glock 48: Single-stack with 10 rounds

The Glock 26 provides a subcompact 9mm option with double-stack magazines. It bridges the gap between the 43's slim profile and the 19's capacity.

For those preferring single-stack designs, the Glock 48 offers the same slim width as the 43X with a longer slide. This configuration improves sight radius and reduces muzzle flip.

Each model serves different carry preferences and body types. The choice depends on individual priorities regarding size, capacity, and comfort levels.

Trigger System and Reliability

Both pistols feature Glock's signature Safe Action trigger system with consistent performance characteristics. The trigger mechanisms share similar designs but have subtle differences in pull weight and feel.

Trigger Mechanism Comparison

The Glock 42 and 43 both use Glock's Safe Action trigger system, which prevents accidental discharges and ensures the gun only fires when the trigger is deliberately pulled. This three-safety system includes a trigger safety, firing pin safety, and drop safety.

Trigger Pull Weight:

• Glock 42: 5.5 pounds

• Glock 43: 5.5 pounds

The Glock 42 provides a smooth and consistent trigger pull that helps shooters maintain accuracy. Some users find the trigger slightly heavier than other models, but it remains reliable for a compact firearm.

Both models feature striker-fired systems with consistent trigger pull for better accuracy during shooting sessions. The trigger travel distance and reset are nearly identical between the two models.

The compact size of these pistols makes trigger upgrades less common than full-size Glocks. Finding trigger upgrades for the Glock 43 requires more research than larger models.

Performance and Track Record

Glock has maintained its reputation for quality and reliability since 1984, with both the 42 and 43 continuing this tradition. The Safe Action system has proven itself across millions of rounds in various conditions.

Reliability Features:

• Minimal moving parts reduce failure points

• Simple design allows easy maintenance

• Consistent ignition in different weather conditions

The trigger systems in both pistols deliver the same level of dependability that law enforcement and civilians expect from Glock firearms. Neither model shows significant advantages in reliability over the other.

Both pistols maintain consistent trigger performance through thousands of rounds. The striker-fired mechanism requires less maintenance than hammer-fired alternatives while delivering predictable results.

Field testing shows both models function reliably with various ammunition types. The trigger system contributes to this reliability by providing consistent ignition timing and pressure.

Frequently Asked Questions

The Glock 42 and 43 differ in caliber, size, and handling characteristics. These differences affect everything from holster compatibility to recoil management and suitability for different shooters.

What are the size comparisons between the Glock 42 and Glock 43?

The Glock 42 measures 5.94 inches in overall length and 4.13 inches in height. It weighs 13.76 ounces unloaded.

The Glock 43 is slightly larger at 6.25 inches in overall length. Both pistols maintain a similar width of approximately 1.06 inches.

The size difference between the two models is minimal but noticeable. The extra length in the Glock 43 accommodates the larger 9mm cartridge.

Which is better for concealed carry, the Glock 42 or Glock 43?

The Glock 42 offers superior concealability due to its smaller size and lighter weight. It disappears easily under clothing and works well for pocket carry.

The Glock 43 provides more stopping power with its 9mm caliber. It remains highly concealable despite being slightly larger.

Both pistols excel at concealed carry applications. The choice depends on whether the shooter prioritizes maximum concealability or increased firepower.

Can the Glock 42 and Glock 43 share the same holster?

The Glock 42 and 43 cannot share the same holster due to their different dimensions. The Glock 43's longer slide and frame require a specifically sized holster.

Most holster manufacturers make separate models for each pistol. Using the wrong holster compromises retention and safety.

Shooters who own both pistols need dedicated holsters for each model. Universal holsters typically do not provide proper fit for either gun.

How does the recoil compare between the Glock 42 and Glock 43?

The Glock 42's .380 ACP cartridge produces softer recoil than the Glock 43's 9mm. This makes it easier to control for rapid follow-up shots.

The Glock 43 generates more recoil due to the more powerful 9mm cartridge. However, the slightly heavier frame helps absorb some of this energy.

New shooters often find the Glock 42 more comfortable to shoot. Experienced shooters can typically handle both pistols without difficulty.

What makes the Glock 43 different from the Glock 42 in terms of handling and performance?

The Glock 43's larger grip provides better control during shooting. The additional weight helps stabilize the pistol during rapid fire sequences.

The 9mm caliber delivers greater stopping power and penetration compared to .380 ACP. This translates to better defensive performance.

Both pistols use the same trigger system and safety features. The main handling difference comes from the size and weight variations between models.

For a female shooter, which is more advisable to use, the Glock 42 or the Glock 43?

The Glock 42 works well for shooters who prefer lighter recoil and easier handling. Its smaller size fits better in smaller hands.

Female shooters with experience handling firearms often choose the Glock 43 for its superior stopping power. The size difference is manageable for most adults.

The choice depends on individual hand size, strength, and shooting experience rather than gender alone. Both pistols can work effectively for any qualified shooter.