This is a Black Rain Ordnance AR known as the SPEC15 chambered in 223 Remington, model BRO-SPEC15-NY.
The Black Rain Ordnance Spec15 series is a line of AR15 rifles and pistols built to meet bid requirements for law enforcement and military personnel and as an affordable option for civilian use. (New York Compliant Model)
Features:
Nitride Coated SPEC15 BCG
Direct Impingement
Low Profile Gas Block
G.I. Trigger