Kel-Tec RDB 5.56 NATO Bullpup Semi-Auto Rifle, 16" Threaded Barrel, Gas-Piston, Downward Ejection, Black
The Kel-Tec RDB stands out with its true downward ejection, adjustable gas-piston system, and compact bullpup layout that places the magazine behind the grip. This example features a 16" threaded barrel with an A2-style flash hider, Picatinny top rail sections, and black polymer furniture with Kel-Tec's signature waffle texture. It is marked Made in USA (Cocoa, FL) with patents pending.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Details: This firearm is in great shape overall, with minor surface scratches and small blemishes from light handling.
What’s Included
- Kel-Tec factory box with matching serial label
- Kel-Tec RDB owner's manual
- 1x 20-round Magpul PMAG Gen M3 magazine (5.56x45)
- Black nylon web sling
This RDB uses a bullpup configuration with the magazine well behind the pistol grip and a true downward ejection chute behind the magwell. Receiver markings indicate Made in USA (Cocoa, FL) with patents pending, and the serial number is engraved on the left side just under the top rail above the F/S safety markings.
The rifle operates via a semi-automatic, gas-piston system. An adjustable gas block with clear +/- markings lets the user tune the system for different loads or conditions. The capacity is 20+1 with the included magazine.
Controls and handling are designed for practical use: a left-side, folding, non-reciprocating charging handle, and an ambidextrous two-position safety with F/S markings. The length of pull measures 14.0 inches.
Furniture includes a polymer handguard and a fixed black polymer stock with an integral rear sling loop. The rubber buttpad carries the molded Kel-Tec logo, and the pistol grip features the Kel-Tec waffle texture for secure purchase.
Up top, Picatinny rail sections are present on the receiver and handguard.




