The KelTec RDB Defender tan bullpup rifle in 5.56mm (KelTec part no. RDBDTAN) is the RDB bullpup fitted with an aluminum M-LOK handguard, a collapsible stock and a 16-inch pencil profile barrel. Spent casings eject downward through the stock, so it handles the same from either shoulder. It comes with three 20-round magazines, and the magwell accepts any AR-15 magazine. A full-length Picatinny rail on top is ready for the optic of your choice.

Key Specifications

• Chambered in 5.56mm, the caliber the maker lists for the RDB Defender.
• The barrel is a 16-inch pencil profile barrel, a full-length barrel in a short bullpup package.
• Capacity is 20 rounds per magazine, and the rifle ships with three magazines for 60 rounds on hand.
• The magwell takes any AR-15 magazine, so extra capacity is easy to add.
• An aluminum M-LOK handguard runs the length of the forend, so a vertical foregrip, light or other accessory mounts where you want it.
• A collapsible stock adjusts the rifle to different shooters and gear.
• A full-length Picatinny rail on top gives room for an optic, red dot or backup sights, with space to set eye relief.
• Spent casings eject downward, so the rifle shoots the same from either shoulder with no brass in your face.
• The controls are fully ambidextrous, which suits left-handed and right-handed shooters alike.
• The color is tan, as the maker lists it for this part number.

Frequently Asked Questions

How many magazines are included? The maker lists three 20-round magazines with the RDB Defender, and the magwell also accepts any AR-15 magazine.

Does the RDB Defender have M-LOK slots? Yes. The aluminum handguard has M-LOK slots along its length for a vertical foregrip, light or other accessories.

Is the stock adjustable? The RDB Defender uses a collapsible stock, and the controls are ambidextrous for use from either shoulder.

Buy the KelTec RDB Defender Bullpup Rifle, 5.56mm, 16-Inch Barrel, M-LOK, Tan, 20-Round

The tan RDB Defender is a complete bullpup setup that gives you a full barrel in a short rifle. Order it from our Lubbock, Texas gun shop for insured shipping to your FFL, and browse more semi-auto rifles while you are at it.