The Glock 20 GEN 4 is a 10mm Auto pistol built for durability and reliability in demanding conditions. It’s a practical choice for hunters, backcountry protection, and shooters who value the 10mm cartridge’s power. We’ve had this model on our shelves since fall 2025, and its low return rate confirms customers get exactly what they expect: a robust, dependable handgun.
Stand-Out Features
- 10mm Auto Power: Chambered for the potent 10mm cartridge, offering superior ballistic performance for hunting and outdoor use.
- GEN 4 Enhancements: Features the Modular Back Strap system for customizable grip fit and a dual recoil spring assembly for reduced felt recoil.
- Proven Reliability: Built on Glock’s legendary Safe Action system, known for consistent performance in all conditions.
- Rough Texture Frame: The RTF (Rough Textured Frame) provides a secure, non-slip grip, even with wet or gloved hands.
- Improved Tolerances: Our staff notes the machining and fit on this generation are noticeably tighter than previous versions.
Technical Data
| Caliber | 10mm Auto |
| Barrel Length | 4.61″ |
| Overall Length | 8.07″ |
| Height | 5.51″ |
| Width | 1.34″ |
| Weight (measured) | 2.2 oz |
| Magazine Capacity | 15 Rounds |
| Frame Material | Polymer |
Your Questions Answered
Is this model California compliant?
No. The Glock 20 GEN 4 is not on the California Roster of Handguns Certified for Sale and is not compliant for sale to residents of California.
What’s the main difference between GEN 3 and GEN 4?
The GEN 4 introduces the Modular Back Strap system for grip customization, an enlarged magazine catch, a dual recoil spring assembly, and the Rough Textured Frame (RTF) for improved grip security.
Do you ship to my FFL?
We ship to all valid, licensed FFL holders in the continental United States. At checkout, you will select your preferred FFL dealer from our verified network or provide their information for verification.
✅ Plain brown box — no markings
✅ Not happy? Return within 30 days.
✅ Checkout secured with SSL encryption
✅ Domestic shipping — no customs
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