Kel-Tec RDB17 5.56 NATO Bullpup Semi-Automatic Rifle – Downward Ejection, Adjustable Gas, Threaded 17.3" Barrel
The Kel-Tec RDB17 offers a compact, fully ambidextrous bullpup design that keeps a full-length 17.3-inch barrel while remaining shorter than an M4 carbine. Its patented downward-ejection chute, four-position gas regulator, and smooth 4.5–5.5 lb trigger make it stand out to shooters who want a modern, feature-rich 5.56 rifle that accepts standard AR-15 magazines.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Specific Condition Notes: Minimal handling marks are present, and the bore remains bright and clean. A few tiny specks of surface rust are visible on some metal hardware.
Bore Condition: Excellent – clean, mirror finish, no signs of wear.
Rifling Condition: Excellent – sharp lands and grooves.
What’s Included
- Kel-Tec RDB17 5.56 NATO rifle
- 1× 30-round Magpul PMAG AR-15 pattern magazine
- 1× 20-round AR-15 pattern magazine
The RDB platform’s patented downward-ejection system directs spent cases straight toward the ground, keeping hot brass away from the shooter and enabling true left- or right-handed use without modification.
An adjustable four-position gas regulator lets you fine-tune the short-stroke piston system for different ammunition or for suppressed shooting, enhancing reliability and softening recoil.
The 17.3-inch chrome-moly, hammer-forged barrel is finished in black nitride for corrosion resistance and long service life. It is threaded for muzzle devices or a suppressor, giving you immediate customization options.
Weighing about 7 pounds unloaded, the RDB17 maintains excellent balance despite its bullpup layout. The glass-fiber-reinforced polymer chassis keeps weight down while providing integrated sling loops and a ventilated handguard for heat management.
A full-length Picatinny top rail offers ready mounting space for optics, and the two-position selector lever is placed for intuitive operation. Combined with the smooth factory trigger linkage, the rifle delivers a crisp, consistent pull uncommon in many bullpup configurations.