Glock 19 Gen 4: Specs, Differences vs Gen 5, Worth It in 2026?

What Is the Glock 19 Gen 4?

The Glock 19 Gen 4 is the fourth generation iteration of the Glock 19, introduced in 2010. It was a significant update from the Gen 3, incorporating user feedback and modern manufacturing improvements. The Gen 4 was produced until 2017 when the Gen 5 was introduced.

Key Gen 4 features include interchangeable backstraps for different hand sizes, improved RTF (Rough Textured Frame) grip texture, a larger magazine release button, and a dual recoil spring assembly designed to reduce felt recoil. The Gen 4 retained finger grooves on the front strap (which existed in earlier generations), which became controversial among some shooters. The Gen 5 generation removed finger grooves.

The Gen 4 is no longer in production, but it's still widely available on the used market and through some dealers with remaining inventory. It remains a solid choice for those who prefer its specific features or find it at a good price point.

Specs & Key Features

Differences: Gen 4 vs Gen 5

Finger Grooves

The Gen 4 has finger grooves molded into the front strap, while the Gen 5 removed them. Finger grooves work well for some hand sizes but can be uncomfortable for others. The Gen 5's smooth front strap accommodates more hand sizes and grip styles.

Grip Texture

The Gen 4 uses RTF (Rough Textured Frame) with more aggressive texture, while the Gen 5 uses a more refined texture that's still grippy but less abrasive. The Gen 4 texture can be rough on skin during extended shooting sessions.

Magazine Release

The Gen 4 has a larger, reversible magazine release button. The Gen 5 also has a reversible release but with a slightly different design. Both are improvements over earlier generations.

Barrel

The Gen 4 uses Glock's polygonal rifling, while the Gen 5 uses Glock's "Marksman Barrel" with revised rifling (often noted for a recessed crown and different rifling approach) for potentially better accuracy. The difference is subtle but measurable in precision shooting.

Trigger

The Gen 5 trigger is generally considered an improvement, with a cleaner break and better reset feel. The Gen 4 trigger is still good, but the Gen 5 refinement is noticeable to many shooters.

Ambidextrous Slide Stop

The Gen 5 features an ambidextrous slide stop lever, while the Gen 4 has a right-side-only slide stop. This is an advantage for left-handed shooters.

Magazine Compatibility

Gen 4 and Gen 5 9mm magazines are generally cross-compatible (both have the dual-side notches). There can be edge-case caveats, such as if someone reverses the magazine release on older magazines without matching notches, but in standard use, both generations' magazines work in both pistols.

Pros & Cons

Is It Worth It in 2026?

Whether the Gen 4 is worth it in 2026 depends on several factors. If you can find a Gen 4 at a significantly lower price than a Gen 5, and the Gen 4's features work for your hand size and preferences, it can be an excellent value.

The Gen 4 is still a reliable, well-made pistol that will serve you well. The differences between Gen 4 and Gen 5 are refinements rather than fundamental changes. If finger grooves fit your hands well and you prefer the more aggressive grip texture, the Gen 4 may actually be preferable.

However, if you're buying new, the Gen 5 is generally the better choice due to its refinements and current production status. For used purchases, the Gen 4 can offer good value if the price is right and it fits your needs.

Who Should (and Shouldn't) Choose It

Best For

• • Those who find finger grooves comfortable
• • Budget-conscious buyers who find a good deal
• • Those who prefer more aggressive grip texture
• • Right-handed shooters (no need for ambidextrous slide stop)
• • Those buying used and finding Gen 4 at good prices

Consider Gen 5 If

• • Finger grooves don't fit your hands
• • You're left-handed (ambidextrous slide stop)
• • You want the latest refinements and improvements
• • You prioritize maximum accuracy (Marksman barrel)
• • You prefer smoother grip texture
• • You're buying new (Gen 5 is current production)

Glock 19 Gen 4 FAQ

Safety Considerations

Ammunition Compatibility

The Gen 4 is designed for standard pressure 9mm Luger ammunition. It can handle +P ammunition, but frequent use may accelerate wear. Always use ammunition that meets SAAMI specifications.

Magazine Compatibility

Gen 4 and Gen 5 9mm magazines are generally cross-compatible (both have the dual-side notches). There can be edge-case caveats with reversed magazine releases or older magazines without matching notches, but in standard use, both generations' magazines work in both pistols.

Grip Fitment

The Gen 4's finger grooves may not fit all hand sizes comfortably. If the grooves don't align with your fingers, it can affect grip and control. Try before you buy if possible, or consider a Gen 5 if finger grooves are a concern.