Rock River Arms AR-15 Varmint Upper 223 Rem 5.56 20" Black 1:8 Free Floating AR Rifles AR0550
>AR-15 Varmint A4 complete upper halves. Includes Bolt carrier group and charging handle.
Caliber .223 Wylde Chamber for 5.56 and .223 Rem cal.
Barrel - Air gauged Stainless steel 20" 1:8 twist. Diameter .920 front of gas block 1.05 under handguard. Low profile gas block and free floating handguard.
Barrel Type: 1:8 Barrel Length: 20 Finish/Color: Black Fit: AR Rifles Type: Upper Manufacturer: Rock River Arms Model: Varmint Mfg Number: AR0550
