The GLOCK 29 GEN 4 is a compact 10mm pistol designed for those who need serious power in a concealable package. It delivers the full 10mm Auto cartridge in a frame smaller than most .45s, making it a practical choice for backcountry defense or as a high-capacity duty backup. Since we added it to our lineup in fall 2025, it has consistently been a top seller and a regular reorder item for us.
Stand-Out Features
- Proven 10mm Power: Chambered in the potent 10mm Auto cartridge, offering superior ballistic performance to 9mm or .40 S&W in a similar-sized package.
- GEN 4 Enhancements: Features the modular backstrap system for customizable grip fit, dual recoil spring assembly for manageable recoil, and the improved RTF4 texture for a secure hold.
- Reliable Drop-In Fit: Our staff has tested this slide assembly on multiple frames. The consistent feedback is a drop-in fit with no fitting required.
- Compact & Concealable: Maintains a shorter slide and grip profile than the full-size GLOCK 20, making it significantly easier to carry concealed.
- Interchangeable Backstraps: Includes multiple backstrap sizes to tailor the grip circumference to your hand for better control.
Technical Data
| Caliber | 10mm Auto |
| Barrel Length | 3.78 inches |
| Overall Length | 6.97 inches |
| Height | 4.53 inches |
| Width | 1.34 inches |
| Weight (measured) | 7.1 oz (slide assembly only, per our scale) |
| Magazine Capacity | 10 Rounds (Standard) |
| Finish | GLOCK’s standard nDLC |
Your Questions Answered
Is this a complete pistol or just the slide?
This listing is for the GLOCK 29 GEN 4 slide assembly only. It includes the slide, barrel, and recoil spring assembly. You will need a compatible GEN 4 or GEN 5 frame, magazine, and other components to build a complete, functional firearm. All sales are subject to applicable federal and state laws.
Will this fit on a Polymer80 frame?
Yes. In our testing, this GEN 4 slide assembly has shown a reliable drop-in fit on Polymer80 PF45 frames built for the GLOCK 20/21. As with any build, final headspace and function checks are the responsibility of the builder.
How does recoil compare to a 9mm?
The 10mm cartridge generates significantly more recoil energy than 9mm. The GLOCK 29’s dual recoil spring and solid construction help manage it, but expect a sharper, more pronounced impulse. It is manageable with proper technique but not a beginner’s round for high-volume practice.
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