|Place of origin||United States|
|Manufacturer||Remington Arms Company Government Arsenal|
|Barrel length||R4 Patrol/Operator/Enhanced: 11.5 in (290 mm)R4 Patrol/Operator/Enhanced: 14.5 in (370 mm)R4 Patrol/Operator/Enhanced: 16 in (410 mm)R4 Patrol 20 in (510 mm)|
|Action||Gas-operated, direct impingement|
In 2012, when the R4 was introduced, the platform was available in four variants: the 7-inch R4-C, 11.5-inch R4-E, 14.5-inch R4 and 20-inch R4-M. In 2018, the platform changed to three variants: the R4 Patrol, R4 Operator, and R4 Enhanced.
In 2013, Remington announced it had been awarded a US$47 million contract by the Armed Forces of the Philippines, for the Philippine Army and the Philippine Marine Corps, placing an order for over 40,000 R4 carbines. The Armed Forces of the Philippines later increased the order to 63,286 R4s which are designated as the R4A3 which is equivalent to the Colt M4 RO977 model and replaces early model M16s.
In March 2015, Remington announced that it would offer the R4 to the civilian market.
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