Bullpup rifles offer a compact footprint without sacrificing barrel length, making them attractive for precision shooters who need maneuverability in tight spaces. Properly designed, a bullpup can deliver rifle-length ballistics with a shorter overall package and reliable ergonomics for both hands.

KELTEC RDB is a standout example of bullpup engineering, built around a 17.3″ barrel within a 27.3″ overall length that preserves .223 Rem / 5.56 NATO performance while remaining highly portable. Its downward ejection system solves the common side-ejection problem found on many bullpups, keeping brass and gas out of the shooter’s line of sight and making the rifle truly ambidextrous.

Key features and technical profile

The RDB’s core specification list is purpose-driven: chambered in .223 Rem / 5.56 NATO, it accepts 20-round or any AR-15 compatible magazines, and weighs approximately 6.7 lbs unloaded. A Picatinny rail atop the receiver accommodates scopes, red dots, and magnified optics, while the 1.7 twist rate (as specified by the manufacturer) supports a wide range of bullet weights. The factory trigger runs about 4.5–5.5 lbs, offering a balance between safety and crispness for precision fire.

Because the RDB is adjustable for different ammunition and performs well with suppressors, it’s a practical choice for shooters who run suppressed setups or mix supersonic and subsonic loads. The rifle’s compact 27.3″ length makes vehicle and close-quarters handling easier without sacrificing the ballistic advantages of a 17.3″ barrel.

View product details and pricing — the current price is listed at $741.99, which positions the RDB as a competitive offering in the semi-auto bullpup segment.

Handling, applications, and recommended uses

In training and field use the RDB’s downward ejection simplifies ambidextrous manipulations: both right- and left-handed shooters can maintain cheek weld and optic acquisition without interruption from hot brass. The rifle’s AR-15 magazine compatibility makes logistics straightforward for range days and armory integration. Expect the platform to perform well for tactical work, range precision, and as a compact patrol solution.

Final buying considerations

For shooters seeking a compact, ambidextrous .223/5.56 platform with a full-length ballistic profile and suppressor friendliness, the KELTEC RDB merits evaluation. Check current availability and see the full product page to compare specs and place an order: Shop this product.

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