LMT Forged M4 Upper Receiver Assembly


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Comes from the factory with forward assist and dust cover already installed.

(5 customer reviews)

198 in stock

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LMT Forged M4 Upper Receiver Assembly

Complete M4 forged upper receiver assembly made by LMT to their stringent QC standards.

This Lewis Machine & Tool M4 style flat top upper receiver comes from the factory with forward assist and dust cover already installed. This forged AR-15 upper receiver is compatible with Mil-Spec parts and lowers. The flat top picatinny rail features laser engraved T-marks to make it easier to put your optic back on in the same spot if you ever take it off. Hardcoat anodized black to military specifications, this LMT Upper Receiver is a reliable foundation for building a high-quality AR.


  • Forged from aluminum
  • Hardcoat anodized
  • T-marked picatinny rail
  • Includes forward assist and dust cover assembly
  • Compatible with Mil-Spec AR-15 lowers and parts

5 reviews for LMT Forged M4 Upper Receiver Assembly

  1. neight (verified owner)

    It’s an upper from LMT, of course it’s awesome. What’s extraordinary is it shipped the day I bought it and turned up at my door morning of the second day after I made the purchase.
    With lunch in the box no less!
    Go ahead and add that s#+t to the cart!!!

  2. Hugh (verified owner)

    Quick shipping, the quality is fantastic on this upper, yes its pricey compared to other assembled uppers but well worth it if you want to match your Lmt lower

  3. Matt (verified owner)

    High quality upper, but tolerances could be better. All the rage are tight fitting thermal fit uppers and my criterion barrel slid into this upper with ease. I’m sure it’ll shoot just fine.

  4. clintonmurders (verified owner)

    Exquisite quality, fast shipping

  5. Bryan Greene (verified owner)

    Great quality from LMT and same day shipping from Rooftop!

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