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AR15 80 Lower

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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
  • 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
  • Polymer80 RL556V3 - RHINO 80% AR15 Lower Receiver ONLY Polymer80 RL556V3 - RHINO 80% AR15 Lower Receiver ONLY 2 Polymer80 RL556V3 - RHINO 80% AR15 Lower Receiver ONLY 3 Polymer80 RL556V3 - RHINO 80% AR15 Lower Receiver ONLY 4 Polymer80 RL556V3 - RHINO 80% AR15 Lower Receiver ONLY 5

    Polymer80 RL556V3 - RHINO 80% AR15 Lower Receiver ONLY

    The most popular polymer AR-15 80% lower. Aluminum 80% lowers can seem challenging to fabricate. That's why Polymer80 introduced the "RHINO" RL556v3, a hugely popular, easier-to-machine 80% lower for the AR platform. It's made from a glass-reinforced...

    $74.99
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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!

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.