Kel-Tec RDB Hunter™ 223 Rem 20.5″ Barrel


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SKU: KELRDB20BLK Categories: , Tag:

Unlike any other hunting rifle on the market, the RDB Hunter features a traditional style stock assembly that houses a fantastic trigger and cross bolt safety. The forend is sleek, ergonomic and features a swivel stud bipod mount. The 20″ threaded barrel is sure to give you plenty of velocity out of your favorite hunting loads.


  • Downward Ejection
    • This unrivaled design sends spent brass downward through the stock, behind the magwell making it a truly ambidextrous bullpup rifle. Gone are the days of hot gas & brass flying out of a side-ejection port… you’re welcome, southpaws.
  • Unparalleled Trigger System
    • Bullpup triggers are notoriously bad, so we tackled that issue head on and won. This trigger is incredibly smooth, with a nice take-up and clean break. Combined with a 1:7 twist barrel, all RDB models offer excellent accuracy.
  • Adjustable Gas System
    • All of the RDB models operate off of the same adjustable gas piston system. This feature allows the user to tailor the bolt carrier speed to eliminate excessive recoil  and ensure reliability for various loads.



Canada Legal Classification Non-Restricted Action Semi-auto
Handedness Ambidextrous Optic Interface Barrel Assembly Mounted Picatinny Rail
Rear Sight None Front Sight None
Default Sight Radius (in; cm) N/A Grip Type Bullpup Stock Integrated Hybrid Grip Textured
Pistol Grip Cap N/A Trigger Type Non-Adjustable
Trigger Material Metal Trigger Compatibility Kel-Tec RDB
Min Trigger Pull (lbs; N) 4; 1.8 Max Trigger Pull (lbs; N) 6; 2.7
Observed Trigger Pull (lbs) ~4 Safety 2-Position Crossbolt
Manual Safety Position Rear Trigger Guard, Above Trigger Magazine Interface Double Stack Double Feed Detachable Box Extended
Magazine Compatibility STANAG 4173 Magazine Capacity 5
Default Length (in; mm) 30.4; 771.5 Min Length (in; mm) 30.4; 771.5
Max Length (in; mm) 30.4; 771.5 Min Width (in; mm) 1.8; 46.6
Max Width (in; mm) 1.8; 46.6 Min Height w/o Mag (in; mm) 4.6; 117.5
Max Height w/ Mag (in; mm) ~9.8; 250 Weight w/o Mag (lbs; kg) 6.9; 3.1
Weight w/ Empty Mag (lbs; kg) >6.9; 3.1 Accessory Interfaces Sling Stud Left Side Buttstock, Forend


Operating Mechanism Short Stroke Adjustable Gas Piston, Rotating Bolt Action Size Standard
Receiver Type Kel-Tec RDB Lower Receiver Material Steel
Lower Receiver Finish Black Upper Receiver Material Steel
Upper Receiver Finish Black Stock Interfacing Mechanism Connected to Receiver via (4) Allen Screws
Stock Interfacing Mechanism Material Steel Stock Interfacing Mechanism Finish Black
Barrel Interfacing Mechanism Inserted into Barrel Extension Barrel Securing Mechanism Threaded Barrel Nut
Barrel Securing Mechanism Material Steel Barrel Securing Mechanism Finish Black
Recoil Lug None Recoil Lug Material N/A
Recoil Lug Finish N/A Feed Type Push
Ejection Bolt Mounted Spring Loaded Twin Ejectors Ejection Direction Down
Bolt Type (2) Piece Bolt and Carrier Bolt Material Steel
Bolt Finish Black Bolt Head Type Integral Part of Bolt
Bolt Lock None Operating Handle Left Side Gas System Mounted Non-Reprociating Folding Charging Handle; Reversible
Operating Handle Material Metal/Polymer Operating Handle Finish Black
Bolt Hold Open Empty Magazine, Manual Charging Handle Notch, Ambidextrous Grip Mounted Bolt Hold/Release Lever Bolt Release Charging Handle Operation, Ambidextrous Bolt Hold/Release Lever
Trigger Guard Type Integral Part of Grip Trigger Guard Material Polymer
Trigger Guard Finish Black Trigger Guard Engraving None
Magazine Release Type Push Button Magazine Release Position Both Sides of Grip, Above Magazine Well
Magazine Cutoff None Anti-Release Magazine Lock Mechanism None


Stock Type Bullpup Receiver Integrated Stock Fit Kel-Tec RDB
Stock Material Polymer Stock Finish Black
Buttpad Soft Polymer Black Textured Adjustable Length of Pull No
Default Length of Pull (in; cm) ~14.3; 36.2 Min Length of Pull (in; cm) ~14.3; 36.2
Max Length of Pull (in; cm) ~14.3; 36.2 Adjustable Comb No
Min Drop at Comb (in; cm) ~0.2; 0.5 Max Drop at Comb (in; cm) ~0.2; 0.5
Min Drop at Heel (in; cm) ~0.2; 0.5 Max Drop at Heel (in; cm) ~0.2; 0.5
Adjustable Cast No Adjustable Pitch No


Forend Type Barrel Assembly Mounted Forend Fit Kel-Tec RDB
Forend Material Polymer Forend Finish Black Textured


Barrel Length (mm) 520.7 Caliber Marking .223 REM
Chamber Size SAAMI Spec Pressure Rating SAAMI Spec
Barrel Profile Round Barrel Material AISI 4140 Steel
Barrel Finish Salt Bath Nitride QPQ Black Chamber Finish Standard
Rifling 6 Groove Twist Rate (in) 1:7
Muzzle Device Thread Protector Muzzle Thread (in) 1/2 x 28

Additional Information:

Distributor Item Number RDB20C-BLK


Manufacturers, importers, suppliers, and distributors may make changes to their products without fanfare. Such changes can lead to discrepancies between the advertised product and the actual product in inventory. While International Shooting Supplies Ltd. endeavors to correctly describe the actual product in inventory, we will not be responsible for unintentional inaccuracies in text and images of the advertised product.


223 Remington



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