The 16M4 is Windham Weaponry's flagship flat-top free-float AR platform. The modular design gives users a full length top rail for mounting optics, sights and accessories for any situation, while the free-floated handguard allows for additional customization without influencing barrel performance. The barrel features a tough chrome lining for incredible corrosion and heat resistance allowing for unparalleled reliability and easy maintenance. This model is chambered in 5.56x45mm NATO and is capable of firing .223 Remington ammunition. It features a 16-inch barrel with a 15-inch M-LOK handguard and includes one 30-round magazine. This model is available for sale only to Law Enforcement.