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5.56 Special Purpose 18" Complete Upper Receiver

$930.00$1,028.00

5.56 Special Purpose 18" Complete Upper Receiver

$930.00$1,028.00

 

Forged Upper Receiver

  • 7075 T6 Construction
  • Forward Assist
  • Ejection Port Door
  • Ejection Port Door Spring
  • Ejection Port Door Rod
  • Cold Hammer Forged
  • DIN 21CrM0V511
  • Black Nitrite Inside and Out
  • 1/7 Twist Rate
  • 1/2 X 28 Thread Pitch for Muzzle
  • 5.56 Nato Chamber
  • .750 Gas Block Seat
  • M4 Feed Ramped Barrel Extension

 

 

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SKU: STU5261-M3C Categories: ,

Description

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Forged Upper Receiver

  • 7075 T6 Construction
  • Forward Assist
  • Ejection Port Door
  • Ejection Port Door Spring
  • Ejection Port Door Rod

18″ CHF Barrel

  • Cold Hammer Forged
  • DIN 21CrM0V511
  • Black Nitrite Inside and Out
  • 1/7 Twist Rate
  • 1/2 X 28 Thread Pitch for Muzzle
  • 5.56 Nato Chamber
  • .750 Gas Block Seat
  • M4 Feed Ramped Barrel Extension
  • 7075 T6 Barrel Nut
  • 6061 T6 Rail
  • Continuous Top Rail
  • Free Floating 1 Piece
  • Q.D. Attachment Points

2-Piece Suppressor Mount

  • Black Nitride

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Low Profile Gas Block

  • Solid Billet Steel
  • .750 I.D.

Rifle Length Gas Tube

  • Black Nitride Inside and Out
  • Gas Tube Roll Pin

Charging Handle

  • Radian Raptor-LT 5.56
  • Mil-Spec Type 3 Coating

Nickel Boron M16 Complete BCG

  • Nickel Boron Coated
  • Laser Engraved with ST Spider logo
  • High Pressure Tested (HPT)
  • Magnetic Particle Inspected (MPI)

Weight: 4lb 6oz

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Our complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. We maintain our high standard of tolerances and attention to detail as the uppers we use for complete rifle builds. Every built upper and complete gun is test fired before leaving our facility for function check before it reaches you. We offer several rail choices and rail lengths. Use the drop bar to make your selection.

NOTE:  All uppers are built to order.  Due to high demand we are currently running               1-2 weeks out for new orders.

Additional information

Weight 4.4 lbs
Dimensions 22 × 6 × 6 in
Rail

M-LOK, SAR3, BAR2

Muzzle Device

2-Piece Mount, R2 Brake

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