Kel-Tec RDB Defender Bullpup-Style Semi-Auto Tactical Rifle 5.56x45mm NATO 16.1" Barrel (1)-20Rd AR-15 Magazine Synthetic Collapsable Stock Black Polymer Finish
The RDB Defender is the result of taking the RDB and the RDB Survival and mashing them up to forge the perfect 5.56, light-duty, tactical bullpup. Its lightweight, comes standard with an aluminum, M-LOK handguard, collapsable stock and 16 pencil profile barrel. Defend your property, your community and your homeland with the most tactically versatile bullpup on the market with the RDB Defender.
Brand Kel-Tec
Category Tactical Rifles
Gun Platform Bullpup-Style
Caliber 5.56x45mm NATO
Model RDB
Series Defender
Stock Finish Black
Action Semi-Auto
Barrel Length Range 16" to 16.99"
Capacity 20+1
Magazine Type AR-15
Grips Black Polymer
Hand Right
Max Capacity 20
Oal 27"
Receiver Finish Black
Receiver Material Polymer
Stock Description Collapsible
Stock Finish Group Black
Stock Material Synthetic
Twist 1:7"
Weight 6.70 lbs
Barrel Length 16.10"
Caliber Dictionary
The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington
