A3 LH Flattop Upper Receiver Assembly (Blem)

Starting At $109.99
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(27 reviews) Write a Review
A3 LH Flattop Upper Receiver Assembly (Blem)

The A3 upper receiver left-handed assembly is made to mil-spec standards and includes a picatinny rail on the top, dust cover, and installed forward assist.

This product is blemished. Blemishes may include:

• Scratches

• Minor tool marks

• Flaws in finish

These products are fully functional. If you don't mind a slight imperfection, this is the perfect product for you. We do not accept returns on blemished products.


Pivot/Takedown Pin Size: Small Pin .250"

Material: Forged and Mil-Spec with Type 3 Hard Coat Anodize

SKU: STAG310412B


Q: Are the bolt carrier and charging handle included?

A: The bolt carrier and charging handle are sold separately.

27 Reviews

  • 5
    Left handed upper receiver

    Posted by Aaron Kleinberg on 1st Apr 2021

    I was very surprised at the quality and finish. No complaints, can’t wait to get it to the range.

  • 5
    LH upper receiver

    Posted by Lonnie Padgett on 1st Apr 2021

    If this is a belimished receiver, I cannot tell. Looks perfect to me and will be the basic foundation of my next build. Thanks.

  • 5
    Zero scratches

    Posted by Nick Bell on 31st Mar 2021

    Not a single thing wrong with it works perfect

  • 5
    Great product great service great price

    Posted by Alan King on 31st Mar 2021

    Ordered left hand upper receiver, received promptly
    No hassle as normal

  • 5
    Excellent quality!

    Posted by Daniel Lapin on 25th Mar 2021

    I am proud of myself...I finally found the blemish. A tiny ding that I would never have seen had I not been looking.

    Aside from that, the upper is extremely well made and beautifully finished. Impressive, and you folks just got a regular customer!

  • 5
    Blem lower.

    Posted by Travis Browning on 20th Mar 2021

    Couldn't even find the blem!!! She runs like a champ turning money into noise!!!

  • 5
    Pleased with the purchase

    Posted by Gordon Sievers on 16th Mar 2021

    The finish on the upper is perfect. I had to look it over very carefully twice before I found a very slight imperfection in the metal molding itself. I seen high dollar firearms on retail shelves that did not look as good as this. I know it will function flawlessly just like the other STAG products I have purchased.

  • 5
    A3 Upper LH

    Posted by Rogelio Landgrave on 26th Feb 2021

    I’ve got say.... I assumed this (blemish) upper would have an area of damage that is noticeable?.... Not the case....Great quality by Stag Arms.... I’m looking forward to this build!

  • 5

    Posted by John J Even on 16th Feb 2021

    All I could see as far as blemishes go was a 2 inch mark in the finish on the inside of the receiver (not even deep enough to call it a scratch) Functionally, it's perfect.