KelTec RDB Defender Tan | 5.56 NATO | 16.1″ | RDBDTAN

The KelTec RDB Defender is a compact, ambidextrous bullpup rifle designed to deliver 5.56/.223 performance in a shorter overall package. It uses a patented downward-ejection system and an adjustable gas piston to accommodate suppressors and a variety of loads. The rifle’s design emphasizes balance and an improved trigger feel for a bullpup platform. For a paired optic under $1,000 that supports both close and mid-range work, consider the Vortex Strike Eagle 1-8×24 for a durable, versatile option.

Product Specifications

• The manufacturer is listed as KelTec.
• The manufacturer part number is RDBDTAN.
• The model family is shown as RDB.
• The action is Semi-Auto.
• The caliber is listed as .223 REM / 5.56 NATO.
• The barrel measures 16.1 inches.
• The barrel material is listed as Steel.
• The finish color is Tan.
• The unloaded weight is listed as 6.7 lbs.
• The twist rate is 1:7″.
• The trigger pull is listed as 4.5-5.5 lbs.
• The rifle features a/an adjustable gas piston system for tuning with suppressors and different loads.
• The ejection system is downward-ejection for true ambidextrous operation.
• The handguard accepts M-LOK accessories.
• The UPC is 640932008104.

This RDB Defender blends the compact handling of a bullpup with design choices aimed at practical use: ambidextrous controls, a downward-ejecting action, and an adjustable gas system that improves compatibility with suppressors and varied ammunition. The M-LOK handguard and lightweight construction keep accessory options open while preserving maneuverability in tight spaces.

Owners frequently praise the RDB platform for its exceptional balance and the smooth, improved trigger relative to many bullpup designs. Many also highlight the ambidextrous downward-ejection system as a meaningful advantage for left- and right-handed shooters.