The Kel-Tec RDB Defender bullpup rifle in 5.56 NATO and black (brand part no. RDBDBLK) uses a downward-ejection bullpup layout to fit a 16.1-inch barrel into a compact 27-inch overall package. KelTec builds the rifle with an aluminum M-LOK handguard, an ambidextrous safety, and feeds it from a 20-round Magpul PMAG that ships with the rifle. The blued barrel and receiver pair with a black synthetic stock, and the rifle weighs 6.4 pounds unloaded. Among bullpup semi-auto rifles, the RDB Defender favors shooters who want a maneuverable, magazine-fed 5.56 platform that runs standard AR-15 magazines.

Key Specifications

• Chambered in 5.56 NATO, also runs .223 Remington.
• Uses a compact bullpup layout with downward ejection.
• Ships with a 20-round Magpul PMAG included.
• Features a 16.1-inch barrel with a blued finish.
• Built with an aluminum M-LOK handguard.
• Equipped with an ambidextrous safety.
• Fitted with a black synthetic stock.
• Overall length is just 27 inches.
• Weighs 6.4 pounds unloaded.

Frequently Asked Questions

What magazines does this rifle use? Standard AR-15 magazines, with a 20-round Magpul PMAG included.

Is the safety ambidextrous? Yes, it’s built for both left- and right-handed shooters.

Buy the Kel-Tec RDB Defender Bullpup Rifle, Black

A maneuverable, magazine-fed 5.56 bullpup is exactly what the RDB Defender delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.