Colt Mfg CR6920-EPR Enhanced Patrol Rifle 5.56x45mm NATO 16.10" 30+1 Black Black Collapsible Stock Black Polymer Grip Right Hand. The Colt Enhanced Patrol Rifle (EPR) is the next evolution in the world's most dependable, thoroughly field-tested patrol rifle. Featuring an extended handguard that accepts modular rail segments for mounting a wide variety of pro-grade optics, lighting, and ergonomics-enhancing accessories, as well as the highly durable Magpul MBUS Pro Series front and rear back up sights and B5 Bravo buttstock. The Colt EPR reestablishes the Colt AR-15 as the finest tool for local, regional, and national law enforcement agencies.