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  • 80% Lower (1-pack) - Blemished

    80% Lower (1-pack) - Blemished

    (1) Blemished Black 80% Lower Receiver: This receiver is blemished. Marks will vary.  The lower receiver is fully functional once fabricated, just like any unblemished 80% lower. This is a NON-REFUNDABLE product. These blems may or may not be...

    $54.99
  • Premium 80% Lower Fire/Safe Marked Billet (1-pack) Premium 80% Lower Fire/Safe Marked Billet (1-pack) Premium 80% Lower Fire/Safe Marked Billet (1-pack) Premium 80% Lower Fire/Safe Marked Billet (1-pack) Premium 80% Lower Fire/Safe Marked Billet (1-pack)

    Premium 80% Lower Fire/Safe Marked Billet (1-pack)

    The Premium 80% Lower Fire/Safe Marked Billet has been redesigned with you in mind. The Premium 80% Billet has been enhanced and now offers a threaded bolt catch release hole as well as a threaded rear takedown detent hole. These enhancements...

    $89.99
  • Sale
    Forged AR15 80% Lower Fire/Safe Marked (1-pack) Forged AR15 80% Lower Fire/Safe Marked (1-pack) Forged AR15 80% Lower Fire/Safe Marked (1-pack)

    80% Lower Fire/Safe Marked (1-pack)

    (1) Black Fire/Safe Marked AR15 Forged 80% Lower Receiver: For AR-15 builds (5.56/.223/300 BLK/6.5 Grendel) Color: Anodized Black Type III Hard Anodized 100% Mil-Spec Quantity: 1 Fire/Safe Marked: Yes Forged 7075-T6 Aluminum Broached Magwell 100% Made...

    Was: $74.99
    Now: $69.99
  • 80% Lower Fire/Safe Marked Raw (1-pack) 80% Lower Fire/Safe Marked Raw (1-pack) 80% Lower Fire/Safe Marked Raw (1-pack) 80% Lower Fire/Safe Marked Raw (1-pack) 80% Lower Fire/Safe Marked Raw (1-pack)

    80% Lower Fire/Safe Marked Raw (1-pack)

    (1) Raw 80% Lower Receiver: Color: Raw - no anodization 100% Mil-Spec Quantity: 1 Fire/Safe Marked: Yes Forged 7075-T6 Aluminum Broached Magwell 100% Made in the USA Find a lower parts kit to complete your forged AR15 80% lower by clicking here.

    $59.99
  • 80% Lower Patriot Pack 80% Lower Patriot Pack 80% Lower Patriot Pack 80% Lower Patriot Pack 80% Lower Patriot Pack

    80% Lower Patriot Pack

    The AR platform has such an amazing variety that sometimes, it can be hard to choose a favorite. Well we're here to tell you, that you don't have to. Grab yourself out bundle of 100% made in USA, black anodized Lower receivers! Find a lower parts kit to...

    $249.99
  • Polymer80 AR15 80% Receiver w/ Jig Kit Polymer80 AR15 80% Receiver w/ Jig Kit Polymer80 AR15 80% Receiver w/ Jig Kit 2 Polymer80 AR15 80% Receiver w/ Jig Kit 3 Polymer80 AR15 80% Receiver w/ Jig Kit 4

    Polymer80 AR15 80% Receiver w/ Jig Kit

    Polymer80's original polymer AR-15 80% lower and jig kit are back! This AR-type lower is a simpler, more affordable version of P80's upgraded "RHINO" RL556V3 80% lower. This lower provides the same, exact functionality and capability when it comes to...

    $99.00
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Quality aluminum and polymer AR-15 80% lowers in stock!

Grab an AR-15 jig, get a lower, and get to machining. Now, Gunbuilders is your one-stop shop for jigs and 80% lowers. We've got quality billet and forged 80 lowers, and polymer AR-15 80% lowers from are friends at Polymer80!

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