AR-15 pattern complete upper receiver assembly (dust cover marked 'MAT9' / '5.56 NATO') – 5" 5.56mm NATO w/ SIG SAUER ROMEO-MSR OPMOD Green Dot
AR-15 pattern complete upper receiver assembly chambered in 5.56mm NATO with a 5" barrel and M-LOK handguard with a full-length top Picatinny rail. Includes bolt carrier group and charging handle.
Also included is a SIG SAUER ROMEO-MSR OPMOD green dot sight (1x20mm) featuring a 2 MOA green dot, top-mounted rotary illumination control with multiple brightness settings, and 20,000+ hour runtime on a CR1632 battery. Pistol buffer tube, buffer spring, end plate, and castle nut are included as well.