The KelTec RDB Defender is a compact, downward-ejecting bullpup rifle chambered for .223 Rem/5.56 NATO. It features a semi-automatic action, an M-LOK aluminum handguard for accessory mounting, and a tan synthetic stock for durable, lightweight handling. The platform uses standard AR-15 magazines and is configured for a compact overall length while retaining a rifle-length barrel.
Key Specifications
- The caliber is .223 Rem/5.56 NATO.
- The action is Semi-Auto.
- The barrel measures 16.1 inches.
- The overall length is 26.1 inches.
- The unloaded weight is approximately 6.4 lbs.
- The magazine capacity is 20 rounds using detachable magazines.
- The stock material is Synthetic in a tan finish.
- The handguard is an Aluminum M-LOK interface for accessories.
- The platform features downward ejection in a bullpup configuration.
Designed for shooters who value a compact, rifle-length-barrel package, the RDB Defender pairs a bullpup layout with an M-LOK interface and standard AR-15 magazine compatibility. Its configuration supports modular accessory mounting and a reduced overall footprint without sacrificing barrel length, making it suitable for applications that require compact storage and maneuverability while retaining rifle performance characteristics.
Product information is supplied by the manufacturer and/or distributor and may be automatically formatted or enhanced using AI for clarity and consistency. While we strive for accuracy, specifications, features, and included items may change without notice. Always verify details using the manufacturer’s official documentation and the information shown on this product page before purchase or use.




