DoubleStar DS-4 AR-15/M4 Flattop Upper Heavy Match Barrel 16 inch 5.56/.223 1-9 Twist A1 Muzzle Device Black ARBU404. 5.56 Nato 1.9 twist M4 Feed Ramps Forged upper Specifications for DoubleStar DS-4 AR-15/M4 Flattop 16" Upper Receiver:...

In stock
  • ShipAmount
  • $0.00
  • RevType
  • 2
  • Manufacturer
  • DoubleStar
  • Sku
  • ARBU404
  • Identity
  • 8227755637

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