1 - Rock River Arms .223/5.56mm 20in. Varmint A4 Complete Upper

Out of stock

  • Manufacturer Rock River Arms
  • Cost Per Round 0.0000
  • Manufacturer SKU ROCKAR0550

This is a Rock River Arms .223/5.56mm 20in. Varmint A4 Complete Upper Receiver. 20" Air Gauged and cryogenically treated Heavy Match Stainless Steel Bull Barrel-1:8 Twist. Barrel diameter .920 front of gas block, 1.050 under handguard. Varmint Gas Block Sight Base. Rifle Length RRA Aluminum Free Float Tube. Phosphate Bolt Carrier Group. Standard Charging handle. 223 WYLDE Caliber to allow use of 5.56 or 223.


*Copy of Photo ID required for purchase of any uppers.

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