Spike’s Tactical M4 16″ Complete Upper – 5.56 NATO – Black

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Spike’s Tactical M4 16″ Complete Upper Assembly 5.56 NATO in Black

The Spike’s Tactical M4 16″ Complete Upper Assembly features a 16″ Barrel chambered in 5.56 NATO.  The M4 Profile Barrel is chrome lined with a 1 in 7″ twist rate. Additionally, the thread pitch for the muzzle is 1/2″ x 28 and it has a MIL-SPEC phosphate coating.  The forged upper receiver is constructed from 7075-T6 Aluminum and hard coat anodized in black.  A Spike’s Tactical Phosphate M16 Bolt Carrier Group is included.  This BCG has been high pressure tested and magnetic particle inspected and finished off with a laser engraved Spike’s ST spider logo.  The gas tube is carbine length and black nitride finished inside and out.


Spike’s Tactical M4 16″ 5.56 NATO Upper Features:

  • 7075-T6 Forged Aluminum Upper Receiver
  • 16″ M4 Profile Barrel
    • Chrome Lined
    • 1 in 7″ Twist
    • 1/2″ x 28 muzzle thread
    • 5.56 NATO
    • .750″ Gas Block Seat
    • MIL-SPEC Phoshate coated
  • A2 Front Sight Base
  • M4 Handguard with double heat shield
  • Carbine Gas Tube
  • Forged Aluminum Charging Handle with MIL-SPEC Type III coating
  • M16 Bolt Carrier Group Phosphate coated
    • High Pressure Tested
    • Magnetic Particle Inspected
    • ST Spider Logo laser engraved
  • Weight: 4lb 2oz

As always, all Spike’s Tactical products boast a Lifetime Warranty from manufacturer defects.


Additional information

Weight 5 lbs

Barrel Chamber

Barrel Twist

Barrel Thread

Barrel Material


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