Franklin Armory F17-M4 Carbine Upper Kit Black 16in Barrel .17WSM

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  • Chambered in 17 Winchester Super Magnum Rimfire
  • 4140 Chrome Moly
  • Salt Bath Nitride Chamber, Bore, & Finish
  • 16" medium contour on F17-M4
  • Threaded Muzzel Crown Threaded 1/2"-28 A2 Flash Hider
  • 1/9-Inch Twist
  • Forged A4 Upper Receiver
  • 7075-T6 Aluminum
  • Hard Coat Type III Anodized Black
  • Full Picatinny Rail
  • Forward Assist
  • TML-7™ Free Float and Knurled Handguard
  • M-Lok Compatible Forward Slots
  • Custom Designed 17 WSM Bolt Carrier Group
  • Gas Piston System (A design Collaboration with Osprey Defense)

The kit will include a complete upper, an F17 series magazine, and an F17 carbine buffer.  The F17-M4 upper kit is designed to work with carbine stocks systems.  Our buffer F17 carbine buffer will work with either commercial or milspec buffer tubes, but this carbine kit is not designed to work with A2 buffer tubes (aka receiver extensions.)


  • Some aftermarket trigger systems may not provide reliable ignition. Check with the trigger manufacturer to confirm that a full power hammer spring and full weight hammer are utilized to ensure reliability.
More Information
Barrel Length 16
Caliber .17 WSM
Capacity 0
Condition New in Box
Finish Per Color Black
Manufacturer Part Number 4157
Model F17-M4
Type Rifle Parts
UPC 000000000000
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