Kansas Gunshop is a Wichita, KS-based retailer specializing in handguns and FFL transfers. The Glock 19 MOS 9mm 10-Round Pistol (Gen4) offers a reliable 9mm platform with optic-ready versatility for modern shooters. Its modular optic system sets it apart. Available now for $499.00.
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 19 MOS Gen4?
| Product Type | Semi-Automatic Pistol |
|---|---|
| Material | Polymer Frame, Steel Slide |
| Manufacturing | Austria |
| Finish | nDLC (Diamond-Like Carbon) |
| Hardness/Quality | Glock factory standards, known for durability |
| Compatibility | Glock MOS (Modular Optic System) plates, 9mm ammunition, Glock 19 Gen4 accessories |
| Installation/Usage | Standard pistol operation, optic mounting via MOS plates |
| Weight | 23.63 oz (unloaded) |
| Dimensions | 7.36 in (Overall Length), 5.04 in (Height), 1.26 in (Width) |
| Country of Origin | Austria |
| Condition | New |
| SKU | UG1950203MOS |
| Caliber | 9x19mm |
| Capacity | 10 Rounds |
| Sights | Fixed Glock Sights |
What are the key features of the Glock 19 MOS Gen4?
The Glock 19 MOS Gen4 brings together the proven reliability of the G19 platform with the added versatility of the Modular Optic System. This means you’re not just getting a standard Glock; you’re getting one that’s ready for a red dot sight right out of the box, with the appropriate adapter plate. The Gen4 RTF (Rough Textured Frame) provides a more secure grip, especially useful in adverse conditions or for shooters with larger hands. The interchangeable backstraps allow for a degree of customization to fit various hand sizes, which is a practical feature for a pistol intended for both carry and range use. The dual recoil spring assembly is designed to increase the service life of the pistol, a detail that serious shooters appreciate. For those in capacity-restricted states, the 10-round magazines ensure compliance while still offering a capable firearm.
As an FFL dealer, I’ve handled countless Glocks, and the Gen4 G19 MOS stands out for its adaptability. The MOS system isn’t just a gimmick; it’s a practical enhancement for anyone considering modernizing their pistol with an optic. The nDLC finish on the slide is tough, holding up well to holster wear and general use, which is what you expect from a Glock. The standard Glock trigger, while not a match-grade unit, is consistent and predictable, making it easy to learn and shoot accurately.
Who should consider the Glock 19 MOS Gen4?
- Buy it if:
- You’re looking for a reliable 9mm pistol that can accept a red dot optic without custom milling.
- You value Glock’s reputation for durability and straightforward operation.
- You need a pistol with a 10-round capacity for legal compliance or preference.
- You want a versatile firearm suitable for concealed carry, home defense, or range shooting.
- You appreciate the ability to customize grip size with interchangeable backstraps.
- Skip it if:
- You prefer a hammer-fired pistol or a different trigger feel (see our other handguns for alternatives).
- You require a higher capacity magazine and are not in a capacity-restricted area (check out our magazine selection for higher capacity options).
- You’re looking for a subcompact pistol for deep concealment (consider a Glock 43 or 43X).
What are the pros and cons of this Glock 19 MOS?
- ✅ Optic-ready MOS system for easy red dot mounting.
- ✅ Proven Glock reliability and durability.
- ✅ 10-round capacity for compliance in restricted states.
- ✅ Interchangeable backstraps for a customized grip.
- ✅ Common and readily available aftermarket support.
- ✅ Consistent trigger pull.
- ❌ Standard Glock sights may be basic for some users.
- ❌ Gen4 RTF texture can be aggressive for some hands (can be smoothed or stippled).
How does the Glock 19 MOS Gen4 compare to similar pistols?
| Feature | Glock 19 MOS Gen4 | Springfield Armory XD-M Elite OSP | Smith & Wesson M&P 2.0 Compact OR |
|---|---|---|---|
| Material | Polymer Frame, Steel Slide | Polymer Frame, Forged Steel Slide | Polymer Frame, Stainless Steel Slide |
| Quality | Industry standard, known for reliability | Good, with focus on ergonomics | Good, with improved trigger over original M&P |
| Compatibility | Glock MOS plates, wide aftermarket | Springfield OSP plates, good aftermarket | S&W C.O.R.E./OR plates, good aftermarket |
| Shipping | Same-day from Kansas Gunshop | Varies by retailer | Varies by retailer |
| Lifespan/Durability | Long, designed for hard use | Good, robust construction | Good, corrosion resistant |
| Price | $499.00 | ~$600-700 | ~$550-650 |
Frequently Asked Questions about the Glock 19 MOS 9mm 10-Round Pistol (Gen4)
What does MOS stand for on a Glock?
MOS stands for “Modular Optic System.” It means the pistol’s slide is cut and drilled to accept adapter plates, allowing you to mount various red dot sights directly to the slide.
Is the Glock 19 MOS Gen4 suitable for concealed carry?
Yes, the Glock 19 MOS Gen4 is a popular choice for concealed carry. Its compact size offers a good balance of concealability and shootability, and the optic-ready feature can enhance aiming for some users.
What kind of maintenance does the Glock 19 MOS Gen4 require?
Like all firearms, the Glock 19 MOS Gen4 requires regular cleaning and lubrication to ensure reliable function. Follow the owner’s manual for specific cleaning instructions, typically after every range session or extended carry.
Can I use higher capacity magazines with this Glock 19 MOS Gen4?
This particular Glock 19 MOS Gen4 comes with 10-round magazines for compliance. If you are in a state where higher capacity magazines are legal, standard Glock 19 magazines (15-round, 17-round, etc.) will function in this pistol.
Where can I buy handguns online?
You can buy handguns online, including this Glock 19 MOS 9mm 10-Round Pistol (Gen4), right here at Kansas Gunshop (kansas-gunshop.com). We facilitate the transfer to your local FFL dealer.
What is the difference between Gen4 and Gen5 Glocks?
The Gen4 features include interchangeable backstraps, a dual recoil spring, and a rough textured frame (RTF). Gen5 models often have an ambidextrous slide stop, a flared magwell, and the Glock Marksman Barrel (GMB), among other refinements. Both are reliable platforms.
Are MOS plates included with the pistol?
Typically, new Glock MOS pistols include a set of adapter plates to fit various popular red dot sights. Always verify the contents with the specific product packaging, but usually, they are in the box.
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