Upper Receivers

L4 Compact Stripped Upper Receiver Group
  • 5.56x45 NATO
  • 300 Blackout
Customize
L4 Duty Stripped Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Patrol Stripped Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Standard Stripped Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Precision Stripped Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Precision+ Stripped Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
Customize
L4 Compact Upper Receiver Group
  • 5.56x45 NATO
  • 300 Blackout
Customize
L4 Duty Upper Receiver Group

L4 Duty Upper Receiver Group

Starting at $685.50

  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Patrol Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Standard Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Precision Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
  • 300 Blackout
Customize
L4 Precision+ Upper Receiver Group
  • 5.56x45 NATO
  • 223 Wylde
Customize