Glock 21 Gen 5 MOS .45 ACP: Premium Collector’s Must-Have with Night Sights

The market for discontinued, optic-ready pistols has tightened, and collectors plus informed shooters are actively seeking models that blend legacy chamberings with modern Gen 5 features. This profile examines one such offering, focusing on condition, features, and tactical utility for owners and serious collectors.

GLOCK G21 GEN 5 MOS

GLOCK G21 GEN 5 MOS .45 ACP right side view with suppressor-height night sights

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This discontinued Gen 5 .45 ACP MOS pistol arrives in excellent used condition and represents the final Glock 21 Gen 5 MOS offerings for collectors. Key details include the aftermarket Trijicon suppressor-height night sights (ideal for co-witnessing with an optic or suppression use), the Gen 5 Marksman barrel, and the factory MOS optic-ready slide with one mounting plate included. The pistol ships in its original Glock case with matching label and has matching serial numbers on slide, barrel, and frame (CAKE289). Shop this product

Why the GLOCK G21 GEN 5 MOS matters

As a .45 ACP handgun, this model balances proven stopping power with platform durability. The 13+1 capacity (one 13-round magazine included) offers a practical loadout for duty, range, or collection display. The Gen 5 updates — no finger grooves, ambidextrous slide stop, and a 5.5 lb trigger — improve ergonomics and control over earlier generations.

Tactical features and practical applications

MOS optic capability

The MOS slide is factory-cut to accept red dot optics and comes with a mounting plate. Paired with suppressor-height sights, the pistol is set up to co-witness or allow low-profile use with a suppressor for subsonic .45 ACP shooting. This combination is valuable for shooters who plan to add an optic or run suppressed loads.

Sights, barrel, and reliability

The installed Trijicon suppressor-height tritium night sights are aftermarket but high quality, making sight picture acquisition faster in low light. The Gen 5 Marksman barrel enhances accuracy potential. The description notes a clean bore and full functionality — important for both range use and safe storage.

Price is listed at $999.99, reflecting its discontinued status and the value of the sight upgrade and original accessories. For full specs and to confirm availability, View product details and pricing.

Close-up of GLOCK G21 GEN 5 MOS suppressor-height night sights and slide

Who should consider this pistol?

Collectors seeking a discontinued Gen 5 .45 ACP MOS, Glock enthusiasts wanting a rare MOS configuration with aftermarket suppressor-height sights, and shooters planning optic or suppressed setups will find value here. The included original case, manual, and matching serials increase its appeal. Check current availability and purchase options through the shop page to secure this example. Check availability

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People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.

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