Glock 21 Gen5 MOS FS Rebuilt: Modern .45 ACP Performance
The Glock 21 Gen5 MOS FS Rebuilt (UR21555MOSFS) is a factory-rebuilt .45 ACP pistol that combines the power of the Glock 21 platform with the latest Gen5 enhancements. This model features the Modular Optic System (MOS) for easy red dot installation, front slide serrations for improved manipulation, and a 13-round magazine capacity. As a US-made rebuilt Glock, it undergoes rigorous inspection and testing to ensure it meets Glock’s high standards of quality and reliability.
The Glock 21 has long been a favorite among law enforcement, military personnel, and civilian shooters who prefer the stopping power of the .45 ACP cartridge. The Gen5 version brings several modern improvements, including the MOS optics-ready slide, ambidextrous slide stop levers, and the nDLC finish for enhanced durability. This rebuilt model offers an outstanding opportunity to own a feature-rich Glock 21 Gen5 at a more accessible price point while maintaining the legendary Glock reliability.
Key Features of the Glock 21 Gen5 MOS FS Rebuilt
Modular Optic System (MOS)
Optics-ready slide allows for quick and secure mounting of popular red dot sights without milling.
Front Slide Serrations
Added front serrations provide better grip and control during slide manipulation and press checks.
13-Round Magazine Capacity
Comes with a 13-round magazine, offering increased capacity over older Glock 21 models.
US Made Rebuilt
Factory-rebuilt in the USA and inspected to meet Glock’s strict quality and performance standards.
Why Choose the Glock 21 Gen5 MOS FS Rebuilt
The Glock 21 Gen5 MOS FS Rebuilt (UR21555MOSFS) delivers the perfect combination of classic .45 ACP power and modern Gen5 features. The MOS system makes this pistol future-proof by allowing easy installation of red dot optics, which have become increasingly popular for faster target acquisition and improved accuracy. The addition of front slide serrations enhances handling, especially when wearing gloves or in high-stress situations.
As a rebuilt model, this Glock 21 Gen5 offers exceptional value without compromising on quality. Glock’s rebuilding process ensures that each pistol meets the same rigorous standards as new production models. The nDLC finish provides superior resistance to corrosion and wear, while the Gen5 improvements such as the flared magwell and ambidextrous controls make the pistol more user-friendly than previous generations. Whether used for home defense, duty carry, or range training, this rebuilt Glock 21 Gen5 MOS delivers reliable performance and modern features at a competitive price.
Additional benefits include:
- Powerful .45 ACP chambering with proven stopping power
- Optics-ready MOS slide for red dot compatibility
- Front slide serrations for improved manipulation
- 13-round magazine capacity for increased firepower
- Factory rebuilt and tested in the USA
- Enhanced Gen5 ergonomics and controls
- Durable nDLC finish for long-term reliability
Technical Specifications – Glock 21 Gen5 MOS FS Rebuilt
| Specification | Details |
|---|
| Brand | Glock |
| Model | 21 Gen5 MOS FS |
| Part Number | UR21555MOSFS |
| UPC | 764503064657 |
| Caliber | .45 ACP |
| Capacity | 13 Rounds |
| Barrel Length | 4.61 inches |
| Optics Ready | Yes (MOS) |
| Front Serrations | Yes |
| Origin | US Made (Rebuilt) |
| Best For | Home Defense, Duty, Range Training |
Ideal Applications for the Glock 21 Gen5 MOS FS Rebuilt
The Glock 21 Gen5 MOS FS Rebuilt is an excellent choice for shooters who want the stopping power of the .45 ACP in a modern, optics-ready platform. The MOS system makes it ideal for those who prefer running a red dot sight for faster target acquisition. Law enforcement officers, security professionals, and civilians looking for a duty or home defense pistol will appreciate the increased capacity and modern features of the Gen5 model.
This rebuilt Glock is also popular among competitive shooters and enthusiasts who want a high-quality .45 ACP pistol without paying full retail price for a new model. The combination of front slide serrations, MOS optics readiness, and the 13-round magazine makes this one of the most feature-rich Glock 21 variants available. Its US-made rebuilt status ensures it has been thoroughly inspected and tested to Glock’s exacting standards, giving buyers confidence in its performance and reliability.
This product is especially popular among .45 ACP enthusiasts, optics users, home defense shooters, and those seeking a feature-packed Glock 21 Gen5 at a great value.
Order the Glock 21 Gen5 MOS FS Rebuilt Today
Experience modern .45 ACP performance with the Glock 21 Gen5 MOS FS Rebuilt (UR21555MOSFS). This US-made pistol features the Modular Optic System, front slide serrations, and a 13-round magazine, delivering the power and reliability Glock is known for. As a factory-rebuilt model, it offers outstanding value while maintaining the quality and performance expected from Glock. Order your Glock 21 Gen5 MOS FS Rebuilt today and own a feature-rich, optics-ready .45 ACP pistol built for serious use.
Glock 21 Gen5 MOS FS Rebuilt US Made 13RD | Model UR21555MOSFS | UPC 764503064657 – Powerful. Modern. Built for Performance.
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