The Glock 17 Gen 4 is a specific variant of the Glock 17 pistol chambered in 9mm Parabellum (9mm Luger). It is an updated version of the original Glock 17 design, incorporating several improvements and enhancements.Some key features of the Glock 17 Gen 4 include:

1. Modular Backstrap System: The Gen 4 models introduced a modular backstrap system that allows users to customize the grip size of the pistol. This feature includes interchangeable backstraps and additional grip texture options, catering to different hand sizes and preferences.
2. Dual Recoil Spring Assembly: The Gen 4 models feature a dual recoil spring assembly, which helps reduce felt recoil and improves the overall durability of the pistol.
3. Magazine Release: The magazine release on the Gen 4 models is enlarged and reversible, making it easier to manipulate for left-handed shooters or those who prefer to use their non-dominant hand.
4. Rough Textured Frame: The frame of the Gen 4 models features a rough texture known as the “RTF” or “Gen 4 Rough Textured” frame. This enhanced grip texture provides better traction and control over the pistol, especially in adverse conditions.
5. Magazine Capacity: The Glock 17 Gen 4 typically comes with a standard magazine capacity of 17 rounds. However, please note that magazine capacity restrictions may vary depending on your jurisdiction.

The Glock 17 Gen 4, like other Glock models, is known for its reliability, simplicity, and widespread use by law enforcement, military, and civilian shooters. However, it’s important to familiarize yourself with and adhere to the applicable laws and regulations regarding firearm ownership and purchase in your specific location.