Kel-Tec RDB Defender 5.56/.223, 16.1″ OD Green

The Kel‑Tec RDB Defender is a compact bullpup semi‑automatic rifle chambered for .223 Rem / 5.56 NATO. Its patented downward‑ejection system and ambidextrous controls make it suitable for both right‑ and left‑handed shooters. The 16.1″ pencil‑profile barrel paired with a 1:7 twist supports accurate performance with common 5.56/.223 loads. An aluminum M‑LOK handguard, collapsible polymer stock and a refined trigger system keep the platform lightweight and accessory‑ready.

Key Specifications

• The caliber is .223 Rem / 5.56 NATO.
• The barrel measures 16.1 inches and features a pencil profile.
• The action is semi‑automatic.
• The rifle uses a downward ejection system for truly ambidextrous operation.
• The handguard is an aluminum M‑LOK design for accessory mounting.
• The safety is ambidextrous for left and right users.
• The rate of twist is 1:7.
• The stock material is polymer (collapsible).
• The finish is OD Green with black metal accents.
• The rifle accepts standard AR‑15 detachable magazines.

Engineered as a compact, modern bullpup, the RDB Defender delivers ambidextrous ergonomics, a user‑friendly feature set and contemporary accessory compatibility. Its combination of a pencil‑profile barrel, adjustable gas system and M‑LOK handguard makes it suitable for range work, compact storage, and field use where a smaller footprint and full‑length ballistic performance are both priorities.