Glock 43X Review & Specs (2026): Capacity, Size, Recoil, Best Use

Specs & Key Features

What Is the Glock 43X?

The Glock 43X is a compact 9mm pistol introduced in 2019. It uses the same slide and barrel as the original Glock 43 but features a longer grip frame that accommodates a 10-round magazine instead of the 43's 6-round capacity.

The "X" designation refers to the extended grip length, not the slide. This design gives you a full three-finger grip while maintaining the slim profile that makes the 43X easy to conceal. The grip is roughly the same length as a Glock 19, but the slide and barrel are shorter, making it a true compact rather than a subcompact.

Unlike the Glock 43, which uses a single-stack magazine, the 43X uses Glock's Slimline 10-round magazine (a slim, staggered-style magazine). This allows for 10 rounds in a grip that's still narrow enough for comfortable concealed carry.

How It Compares to Similar Options

Glock 43X vs Glock 43

The original Glock 43 is a true subcompact with a 6-round capacity and shorter grip. The 43X adds roughly 0.6 inches to the grip height to accommodate 10 rounds. Both share the same slide, barrel, and overall length.

Choose the 43 if you prioritize maximum concealability and don't mind the lower capacity. Choose the 43X if you want more rounds and prefer a full grip for better control.

Glock 43X vs Glock 43X MOS

The 43X MOS (Modular Optic System) version includes a factory-milled slide that is optics-ready. The MOS uses the Slimline optics-ready cut (commonly associated with RMSc-pattern optics), but some optics may require plates or adapters depending on the specific model. The standard 43X requires aftermarket slide milling to mount an optic.

If you plan to use a red dot, the MOS version is the better choice. If you prefer iron sights or don't want to invest in an optic, the standard 43X saves money and weight.

Glock 43X vs Glock 19

The Glock 19 is a compact double-stack with a 15-round capacity and longer slide. The 43X is thinner, lighter, and shorter in overall length, making it easier to conceal, but you sacrifice 5 rounds of capacity.

The 43X is better for deep concealment and smaller-framed shooters. The Glock 19 offers more capacity and a longer sight radius, making it better for duty use or if you can conceal a larger pistol.

Pros & Cons

Recoil & Shootability

The 43X's recoil is manageable for a compact 9mm. The longer grip provides better leverage and control compared to true subcompacts, making follow-up shots easier. Most shooters find it more comfortable to shoot than the shorter-gripped Glock 43.

The trigger is typical Glock: consistent, with a clean break around 5.5 pounds. The grip angle and texture provide good control, though some shooters prefer aftermarket grip enhancements for extended range sessions.

For new shooters, the 43X is easier to control than smaller subcompacts but may still require practice to shoot accurately at distance. The short sight radius makes precision shooting more challenging than with full-size pistols.

Common Misconceptions

"The 43X is just a Glock 43 with a longer grip"

While the slide and barrel are identical, the 43X uses a different magazine design (Glock's Slimline magazine system vs single-stack) and a different frame. The key truth is that Glock 43 magazines do not fit the 43X, and the capacity comes from the Slimline magazine system, not a standard double-stack design.

"10 rounds isn't enough for self-defense"

Capacity is a personal decision based on your situation and comfort level. Many experienced carriers choose the 43X for its balance of capacity and concealability. The 10-round capacity is a significant improvement over 6-round subcompacts while maintaining a slim profile.

"The 43X is too big for concealed carry"

The 43X is actually one of the easier compact pistols to conceal due to its slim width. The grip length is similar to a Glock 19, but the shorter slide and thinner profile make it more concealable for many body types.

Safety Considerations

Ammunition Compatibility

The 43X is designed for standard pressure 9mm Luger ammunition. While it can handle +P ammunition, frequent use of +P loads may accelerate wear. Always use ammunition that meets SAAMI specifications.

Holster Selection

Use a quality holster that completely covers the trigger guard. The 43X's slim profile works well with appendix carry holsters, but ensure proper fitment and retention. Popular options include IWB holstersfrom companies like Tenicor and PHLster. Test your holster setup with an unloaded pistol before carrying.

Training Recommendations

Practice drawing from concealment regularly. The compact size requires good technique to achieve fast, accurate first shots. Dry-fire practice is essential for developing muscle memory. Consider professional training if you're new to concealed carry.

Magazine Compatibility

The 43X uses proprietary magazines that are not compatible with other Glock models. Aftermarket options like Shield Arms S15 magazines can increase capacity to 15 rounds, but test them thoroughly for reliability in your specific pistol.

Who Should (and Shouldn't) Choose It

Best For

• • Concealed carriers who want more capacity than a 6-round subcompact
• • Shooters who prefer a full grip but need a slim profile
• • Those transitioning from larger pistols who want easier concealment
• • Shooters who want Glock reliability in a compact package
• • People with smaller hands who find double-stack compacts too wide

Consider Alternatives If

• • You need maximum capacity (consider Glock 19 or similar)
• • You want a red dot without aftermarket work (choose 43X MOS)
• • You prioritize maximum concealability over capacity (consider Glock 43)
• • You need a longer sight radius for precision shooting
• • Budget is a primary concern (there are less expensive options)

Glock 43X FAQ