NFR
» M4 Aluminum Quad Rail

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Description:
    Carbine length M4 replacement forend rail system
      System adds four mil-spec Picatinny rails for versatile accessory applications
        Precision machined from 6061 T6 billet Aluminum for Maximum strength
          Fully rugged construction will not bend or deform under any condition
            Field tested under extreme conditions for maximum performance and durability
              Hard coat anodized for optimum wear resistance
              Simple installation, replace your polymer hand guards and secured by 4 bolts
              Rail system firmly locks to the barrel nut and front Hand guard Cap
              No gunsmith required
              System aligns perfectly upper receiver rail
              Receiver alignment is achieved by implementation of anti-rotation locking tabs
              Slim profile for better grip and handling of the firearm