Marked with highly desirable "M4 Carbine" 

Factory Colt complete lower receiver assembly to build your AR15, M16 or M4. Compatible with all mil-spec AR15/M4/M16 upper receivers. Manufactured to truly meet and exceed all Mil Spec standards.

-New lower receiver from complete rifle.

-7075-T6 aluminum


  • Marked for 5.56 NATO
  • Single Stage Semi Auto Trigger
  • A2 Colt Grip
  • 4 Position buffer tube
  • Factory staked castle nut
  • Removed from factory rifles

**This item requires an FFL.  Please send an email to with order # and copy of your receiving FFL's License.**

MFG Colt
MODEL Colt M4 Lower Receiver
TITLE Colt M4 Lower Receiver

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