The bullpup configuration compactly moves the action behind the trigger group, delivering a shorter overall length without sacrificing barrel length — ideal for shooters who need maneuverability in confined spaces while maintaining ballistic performance. A tactical shooter or rifle owner evaluating compact semiautos will appreciate attention to rail options, ergonomics, and caliber compatibility when selecting a practical defensive rifle.

KELTEC RDB BULLPUP — KelTec RDB Bullpup semiautomatic rifle chambered in .223 REM/5.56 NATO. This rifle was made in the U.S.A. The rifle has a few marks and scratches on the stock and receiver. There are rails on the top and bottom of the forearm. Shop this product

Design and Rail Flexibility

The RDB’s bullpup layout shortens overall length for close-quarters handling while preserving a standard-length barrel for velocity. Notably, rails on the top and bottom of the forearm provide real estate for back-up sights, optics, weapon lights, and vertical grips. Those accessory mounting points let you tailor the platform for home defense, range drills, or duty use without heavy modification.

Durability and condition notes

This particular rifle shows a few marks and scratches on the stock and receiver—typical cosmetic wear that does not detract from mechanical function when properly inspected. Buyers should evaluate these cosmetic details against price and intended use.

Caliber Advantages: .223 REM / 5.56 NATO

Chambered in .223 REM/5.56 NATO, the RDB balances low recoil, ample magazine capacity, and broad ammunition availability. That caliber suite is effective for target work, defensive scenarios, and general training. Shooters benefit from readily available load selections and established ballistic behavior at common engagement ranges.

Brand and category context: Keltec has earned attention for compact, innovative designs; listed under the Semi Auto category with model noted as Various, this RDB represents the company’s take on a compact tactical rifle. Current listed price: $1,224.99. View product details and pricing

Practical Considerations for Buyers

Inspect the receiver and stock for any functional issues despite cosmetic marks. Confirm that the top rail aligns with your preferred optic footprint and that the lower rail accommodates lights or hand stops you plan to use. Given the caliber and compact form, this rifle is well suited for shooters seeking a maneuverable Semi Auto with adaptable accessory options.

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