The GLOCK G21 Gen5 MOS FDE (PA215S101MOSFDE) is a full-size .45 ACP handgun engineered to deliver uncompromising firepower with modern versatility. Featuring a Flat Dark Earth (FDE) polymer frame, this model combines Glock’s battle-proven design with a tactical color profile and the ability to mount red dot optics straight from the factory.
With a 10+1 capacity and a 4.6″ Glock Marksman Barrel (GMB), the G21 Gen5 MOS is optimized for accuracy, energy delivery, and recoil control. Gen5 features include front slide serrations, no finger grooves, a flared magwell, and an ambidextrous slide stop lever — all wrapped in Glock’s nDLC-coated optic-ready slide.
The MOS (Modular Optic System) cut lets you install your favorite red dot using Glock’s adapter plate system, while the Picatinny-style accessory rail supports light and laser attachments. The G21 Gen5 MOS FDE is ideal for shooters looking for serious stopping power with enhanced customization.
Key Features:
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Caliber: .45 ACP
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Capacity: 10+1
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Barrel Length: 4.6″
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Frame Color: Flat Dark Earth (FDE)
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Slide Cut: MOS – Optic Ready
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Slide Finish: Black nDLC
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Sights: Fixed
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Frame Material: Polymer
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Slide Material: Steel
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Accessory Rail: Picatinny-style
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Controls: Ambidextrous slide stop, reversible mag release
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Trigger System: Glock Safe Action®
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Part Number: PA215S101MOSFDE
Manufacturer Specifications:
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Overall Length: 8.07″
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Slide Length: 7.32″
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Height (with magazine): 5.51″
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Width (Overall): 1.34″
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Slide Width: 1.00″
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Weight (unloaded): 29.81 oz
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Weight (loaded): 38.80 oz
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Trigger Pull: ~5.5 lbs
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Trigger Distance: 2.76″
FAQ:
Q: What optics are compatible with the G21 Gen5 MOS?
A: The slide is cut for Glock’s MOS plate system, compatible with red dots such as Trijicon RMR, Holosun 507C, and others.
Q: Is the FDE frame factory or custom?
A: The Flat Dark Earth (FDE) frame is a factory Cerakote option, offering enhanced surface durability and a tactical appearance.
Q: Is this model suitable for restricted states?
A: Yes. This version includes 10-round magazines, making it compliant in capacity-limited areas.
Q: What use cases is the G21 best suited for?
A: The G21 Gen5 is excellent for home defense, duty carry, backcountry protection, and any scenario requiring high-impact .45 ACP performance.
Q: What’s included in the box?
A: Includes the G21 Gen5 MOS FDE pistol, three 10-round magazines, MOS adapter plate set, backstrap kit, cleaning tools, and Glock hard case.
Brought to you by Black Bayou Armory.
