Rock River Arms RRA 20 Inch Varmint A4 Upper AR-15 Wylde 5.56 (also shoots .223) AR15 AR0550X
Looking for ultimate accuracy in an AR15 upper? The Rock River 20" Cryogenically treated air guaged stainless steel barrel AR upper offers amazing performance at a best in class price. Check out the unbiased reviews at third party sites such as sniper central:
Free floated upper built for distance on a milspec Rock River forged A4 upper receiver. Complete upper includes charging handle and bcg bolt carrier group.
Caliber: Wylde Chamber for 5.56 & .223
Handguard: RRA TRO Octagonal Free Float with Top Rail
Barrel: Air Gauged Stainless Steel Bull 1:8 Twist. Diameter .920 front of gas block, 1.050 under handguard.
Gas Block: Low Profile Concealed