The modern bullpup rifle balances compact footprint with full-length barrel performance, and a key challenge for designers has always been reliable, user-friendly ejection. The rifle below demonstrates a practical solution that keeps spent brass out of the shooter’s face while retaining familiar controls and sight radius.

KELTEC RDB-20 is a semi-automatic bullpup configured rifle chambered in 223 Rem/5.56 NATO with a 20.5″ barrel, picatinny rail for optics, and a black nitride finish.

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Design and Downward Ejection

The defining feature of the KELTEC RDB-20 is its downward ejection system. A rotary bolt with a spring-loaded ejector and an extractor oriented downward pulls the spent case rearward along the top of the magazine and channels it through a vertical chute. That arrangement keeps brass from blowing across the shooter’s line of sight and provides true ambidextrous usability without complex forward-eject mechanisms.

Mechanics that Matter

The hammer is U-shaped and runs outside the chute and above the magazine while bolt travel remains within ergonomic limits. Gravity-assisted ejection pairs with higher bolt energy at feeding, and the platform’s design yields consistent cycling across feeding conditions.

Gas System, Construction, and Controls

The rifle uses a short-stroke gas-operated piston that is fully adjustable for different ammunition and muzzle attachments, making it adaptable from light training loads to hotter defensive rounds. Its common steel skeleton—formed by receiver and barrel sub-assemblies—means bolt, bolt carrier, firing mechanism, ejector chute, and bolt stop are identical across variations, simplifying maintenance.

Ergonomics, Ballistics, and Use Cases

At 6.9 lbs and with a 20.5″ barrel, the KELTEC RDB-20 delivers ballistics close to traditional rifles while keeping an overall compact profile. The picatinny rail supports red dots, magnified optics, or backup sights. Texturing on the polymer grip and forend improves positive control during rapid transitions and off-hand firing. Chambered for 223 Rem/5.56 NATO, it’s suitable for training, varmint work, and tactical drills where controllable recoil and ammo availability matter.

Priced at $868.99, the KELTEC RDB-20 offers a distinctive feature set for shooters who want bullpup compactness without the common ejection compromises. View product details and pricing to compare configurations and availability.

For buyers seeking a compact, ambidextrous-capable semi-auto with an innovative downward-ejection system, the KELTEC RDB-20 is a strong candidate. Check current availability on our shop page to purchase through the retailer.

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.