A3 LH Flattop Upper Receiver Assembly (Blem)

Starting At $109.99
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(26 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.

26 Reviews

  • 5
    Blem Left Hand Upper

    Posted by David on 15th May 2021

    Very good product finish was really good and all parts look and work perfectly

  • 5
    A3 LH Upper receiver blem

    Posted by Steve M on 13th May 2021

    Discount for blem so fantastic price. Looks and functions flawlessly. Cant even see any imperfections.

  • 5
    Very good

    Posted by Clay Gibson on 13th May 2021

    I’ve built several LH AR’s with stag parts and have never had any problems at all. My main 6.8 Spc has a few thousand rounds through it and the only malfunction I’ve had was an adjustable gas block that was not stag. I highly recommend

  • 5
    A3 LH Flattop Upper

    Posted by Terrence Horton on 6th May 2021

    Received in good time. Product looked great. Had a hard time finding the blemish. Very pleased with this upper. I’ve seen non blems that don’t look this good. I would order from them again.

  • 5
    blem left hand upper x 2 and

    Posted by Michael tuck on 5th May 2021

    It arrived sooner than I imagined... blem?? huh? lol. works perfect..

    buying another

  • 5
    A3 LH Flattop Upper

    Posted by Keith Gladwell on 2nd May 2021

    Arrived as described, great price as well. Found the blem and I am not at all worried about it. Just waiting for some additional parts and will be building it up.

  • 5
    Blem upper complete

    Posted by Peter on 13th Apr 2021

    Excellent quality! Delivery and service from stag. Ordered 3 uppers from them so far. If you're tired of hot gas in your face these are a must. Now me and my son enjoy shooting and no more burnt cheeks!

  • 5
    LH Upper

    Posted by Jered on 12th Apr 2021

    Absolutely love it! Wish all my AR’s were left handed!

  • 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.