Colt M4 to M5 PDW Upper Reciever Kit 5.56 Nato 10.3 in. Heavy Barrel Black

The Colt M4 to M5 PDW Upper Receiver Kit is a complete 5.56 NATO upper receiver conversion kit designed to modernize legacy M4 platforms. It features a 10.3-inch chrome-lined heavy barrel, a one-piece free-floating M-LOK handguard, and a continuous MIL-STD-1913 top rail for optics and accessories. The enhanced upper incorporates a self-centering barrel nut and keyed barrel extension to improve rigidity and consistency. The kit includes an ambidextrous Radian Raptor charging handle and folding Troy metal sights.

• Complete upper receiver conversion kit
• Caliber: 5.56 NATO
• Barrel Length: 10.3"
• Heavy barrel
• Chrome-lined barrel
• 1:7 twist rate
• Direct impingment gas system
• Carbine-length gas system
• One-piece free-floating M-LOK handguard
• Continuous MIL-STD-1913 top rail
• Improved barrel retention interface
• Self-centering barrel nut