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CMMG Mk4LE AR-15 16" 5.56x45mm Flat Top Upper Receiver (55BE1F0)

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CMMG Upper Features

  • 5.56x45mm NATO Chamber
  • 16” M4 Profile Barrel
  • Salt Bath Nitride barrel
  • 1:7 Twist
  • Carbine Length Gas System
  • Standard M4 handguard and front sight base
  • M16 Bolt Carrier Group
  • Charging Handle Included


Overview of CMMG Mk4LE AR-15 Complete Upper Receiver

CMMG is well known in the industry to produce some of the highest quality AR-15 components at very cost competitive prices.  This AR-15 Upper is no different.  This CMMG upper is their basic Mk4LE model.  This upper is design and a simple, no frills, all business upper receiver.  This AR-15 upper receive has a flat top, Picatinny upper, which is ready to accept your optic of choice.  Additionally, this upper receiver group has a fixed A2 front sight base.  This font sight will work seamlessly with a rear mounted back-up iron sight (BUIS).  The plastic handguard makes for a light weight upper receiver that will handle well and not be overly burdensome.


Additional Information

Part #55BE1F0


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