The Magpul PDR (Personal Defense Rifle) is a compact bullpup-style 5.56x45mmcarbine being developed by Magpul Industries. Although halted in development, it has garnered some attention, largely due to its "futuristic" appearance. The system consists of a gas-operated bullpup intended to replace some submachine guns, M9 pistols and M4 carbines while still offering the rapid fire and range of a M4 carbine in an ultra compact firearm.
The PDR is one of the few personal defense weapons to use a standard caliber. This decision was made to minimize the logistic burden of the weapon. The method of operation is a short stroke gas piston that may or may not include a two baffle compensator, barrel lengths of between 10.5 to 12.5 inches. It is striker-fired, uses STANAG magazines, features an ambidextrous ejection system, and ambidextrous controls. A Picatinny rail offers mounting for various optics. There is also some indication of integrated lighting and/or laser systems
The PDR-C (Compact) features an FN P90-style pistol grip and ergonomics offering a more compact weapon, while the PDR-D (Direct) uses a more conventional pistol grip with vertical grip (similar to a Steyr TMP) and safety nub to keep users from injuring themselves.
Magpul's "Professional Training Division" (PTS) has developed an airsoft rendition of the PDR in conjunction with Magpul to finalize the firearm's aesthetic design.