Project X 80% Lower Billet (1-pack)

(You save $28.00 )


Imagine an AR-15 lower receiver that's been scrutinized and been under the microscope so much that it's been refined more than a hand full of times. Imagine people like yourself in the real world giving feedback, what they like and don't like, and providing suggestions for improvement. Now imagine a company that gives a damn about all those voices and takes their words to heart. Enter Broken Arms. And behold the tenth revision of their billet 80% lower receiver: the Project X 80% Lower.

Broken Arms listened to all those voices over and over again, and the result was an 80% lower that when finished by you, a real-world person, would serve you better than any billet lower you could buy off the shelf at your local LGS. How do we know it's better? Because these are your features. These are your suggestions. It's what you want. And we got 'em to give to ya.

Features of the Project X 80% Lower:

  • For AR-15 builds (5.56/.223/300 BLK/6.5 Grendel)
  • Hard black anodize type III (mil spec) DI sealed
  • Mil-Spec broached magwell
  • Glass bead blasted
  • 6-32 pin/screw for the bolt catch. (replaces roll pin)
  • Added nylon tipped screw in rear of lower. (removes slop between upper and lower after a lot of use)
No FFL required  Made in the USA  Lifetime Warranty

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or “assault weapons” (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

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, 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.