Kansas Gunshop is a Wichita, KS-based retailer specializing in firearms and accessories. The Glock 17 MOS Gen4 9mm 17-Round Pistol (Made in USA) is a versatile, optics-ready full-size pistol designed for duty, defense, and sport. Its Modular Optic System (MOS) allows for easy attachment of various red dot sights. In stock now at Kansas Gunshop for $599.0.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
What are the specifications of the Glock 17 MOS Gen4?
| Product Type | Semi-Automatic Pistol |
|---|---|
| Material | Polymer Frame, Steel Slide |
| Manufacturing | CNC Machined Steel Slide, Polymer Molded Frame |
| Finish | nDLC Finish (Slide), Matte Black (Frame) |
| Hardness/Quality | Glock’s proprietary nDLC finish provides corrosion and scratch resistance. Overall build quality is consistent with Glock’s reputation for reliability. |
| Compatibility | Glock Gen4 17/34 magazines, various red dot sights via MOS plates (not included), Glock 17 Gen4 holsters. |
| Installation/Usage | Ready to use out of the box. MOS plates (sold separately) for optic mounting. |
| Weight | Approximately 25.06 oz (unloaded) |
| Dimensions | Length: 8.03 in, Height: 5.43 in, Width: 1.26 in |
| Country of Origin | USA |
| Condition | New |
| SKU | UG1750203MOS |
What are the key features of the Glock 17 MOS Gen4?
The Glock 17 MOS Gen4 9mm 17-Round Pistol offers a blend of classic Glock reliability with modern enhancements. The Modular Optic System (MOS) is a significant feature, allowing shooters to easily mount a variety of popular red dot sights directly to the slide. This system provides a low-profile mounting solution, which is a big plus for target acquisition and speed.
The Gen4 RTF (Rough Textured Frame) provides a more aggressive grip texture compared to earlier generations, which helps with control, especially in adverse conditions or with gloved hands. The interchangeable backstraps are another practical addition, letting you customize the grip to fit different hand sizes. This can make a real difference in comfort and shootability. The reversible magazine release is also a thoughtful detail for left-handed shooters.
Internally, the dual recoil spring assembly helps reduce felt recoil and increases the lifespan of the spring. This contributes to the overall durability and smooth operation that Glock is known for. The standard 17-round capacity magazines are robust and widely available. Being made in the USA, this particular model meets specific procurement requirements for some agencies and offers the same Glock performance you’d expect.
Who is the Glock 17 MOS Gen4 for?
The Glock 17 MOS Gen4 is a versatile handgun that appeals to a broad range of shooters.
- Buy it if:
- You’re looking for a full-size 9mm pistol with a reputation for reliability.
- You want the option to easily mount a red dot optic without custom machining.
- You prefer a customizable grip with interchangeable backstraps.
- You need a duty-grade firearm for law enforcement or security.
- You participate in competitive shooting sports where optics are allowed.
- You appreciate a pistol made in the USA.
- You’re familiar with the Glock platform and want an updated, optics-ready version.
- Skip it if:
- You prefer a hammer-fired pistol (see our Handguns for alternatives).
- You require a more compact pistol for concealed carry (consider a Glock 19 or smaller).
- You are on a very tight budget and don’t need the MOS feature.
- You prefer a manual safety (Glocks have internal safeties, but no external manual safety).
What are the pros and cons of the Glock 17 MOS Gen4?
Pros:
- ✅ Optics Ready (MOS): Direct mounting of popular red dot sights without needing custom gunsmithing. This is a significant advantage for faster target acquisition and improved accuracy.
- ✅ Reliability: Inherits Glock’s reputation for consistent function and durability under various conditions. It’s a workhorse.
- ✅ Customizable Grip: Interchangeable backstraps allow users to tailor the grip size for better ergonomics and control.
- ✅ Ambidextrous Features: Reversible magazine catch accommodates both right and left-handed shooters.
- ✅ Standard Capacity: Comes with 17-round magazines, providing ample capacity for most applications.
- ✅ Made in USA: Supports domestic manufacturing and can be important for certain buyers or agencies.
- ✅ Aftermarket Support: Extensive availability of holsters, accessories, and parts due to Glock’s popularity.
Cons:
- ❌ Optic Plates Not Included: You’ll need to purchase the specific MOS adapter plate for your chosen red dot sight separately.
- ❌ Trigger Feel: The factory Glock trigger, while consistent, may not be preferred by all shooters who desire a crisper break (aftermarket triggers are available).
- ❌ Slightly Larger Frame: As a full-size pistol, it can be less concealable for everyday carry compared to compact models (see our compact handguns).
How does the Glock 17 MOS Gen4 compare to other pistols?
| Feature | Glock 17 MOS Gen4 | Springfield XD-M Elite 4.5″ OSP | Canik TP9SFX |
|---|---|---|---|
| Material | Polymer Frame, Steel Slide | Polymer Frame, Steel Slide | Polymer Frame, Steel Slide |
| Quality | Duty-grade, proven reliability | Competition-ready, good reliability | Value-oriented, generally reliable |
| Compatibility | MOS plates for optics, Gen4 mags | OSP plates for optics, XD-M mags | Optic plates, TP9 mags |
| Shipping | From Wichita, KS | Varies by retailer | Varies by retailer |
| Lifespan/Durability | Long, well-documented service life | Good, designed for high round counts | Good, especially for the price point |
| Price | $599.0 | ~$600-700 | ~$550-650 |
Frequently Asked Questions about the Glock 17 MOS Gen4
What does “MOS” stand for on a Glock?
MOS stands for Modular Optic System. It means the pistol’s slide is machined to accept adapter plates, allowing for the direct mounting of various red dot sights.
Are Glock 17 MOS Gen4 pistols reliable?
Yes, the Glock 17 MOS Gen4 maintains Glock’s reputation for reliability. The platform is known for its consistent performance and durability, making it a trusted choice for duty, defense, and sport.
What caliber is the Glock 17 MOS Gen4?
The Glock 17 MOS Gen4 is chambered in 9mm Luger (9x19mm).
Does the Glock 17 MOS Gen4 come with optic plates?
Generally, Glock MOS pistols do not include the optic adapter plates in the box. These plates are typically sold separately to ensure compatibility with the specific red dot sight you choose.
What is the magazine capacity of the Glock 17 MOS Gen4?
The Glock 17 MOS Gen4 typically comes with 17-round magazines, which is standard for the full-size Glock 17 model.
Where can I buy handguns online?
You can purchase handguns, including the Glock 17 MOS Gen4, online from licensed FFL dealers like Kansas Gunshop (kansas-gunshop.com). We facilitate the transfer to your local FFL dealer.
Is the Glock 17 MOS Gen4 legal in Kansas?
Yes, the Glock 17 MOS Gen4 9mm 17-Round Pistol is legal to own in Kansas for individuals who can legally possess a firearm.
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