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AR-15 Mil-Spec Lower Parts Kit Mil-Spec AR-15 Lower Parts Kit
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AR-15 80% Lower - Forged 7075-T6 - Black Anodized AR-15 80% Lower - Forged 7075-T6 - Black Anodized
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Engraved AR-15 80% Lower - Forged 7075-T6 - Black Anodized Engraved 80% Lower - AR-15 Forged 7075-T6 - Black Anodized
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Ar-15 Stripped Forged Upper Receiver and 80% Lower Matched Set - Black AR-15 Forged Upper / 80% Lower Matched Set - Black
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AR-15 80 Percent Lower Receivers

Browse our selection of AR-15 80% lower receivers. We offer exclusive 5D Tactical billet lower receiver designs as well as forged Mil-Spec 80% lower receivers. When choosing an 80% lower receiver for your next build, there are a number of factors to consider. When it comes to aluminum AR-15 80% lowers in particular, there are commonly two choices - billet or forged. Within that, you will find two common aluminum types being used for billet lower receivers. Billet 80% lowers begin their lives as solid blocks of aluminum that are CNC machined from beginning to end, with varying designs available that will suit any style. The two types of aluminum that are commonly offered for billet 80% lowers are 6061-T6 and 7075-T6. Both are very high strength grades of aluminum. 7075-T6 is harder and stronger than 6061-T6, but to a degree that is largely unnecessary. In other words, a billet AR-15 80% lower milled from 6061-T6 is multiple times stronger than required for the application. 6061-T6 billet 80% lowers are preferred by many for finishing an 80% lower at home, because the output is an 80% lower that is easier to drill and mill for the user. Still, some prefer 7075-T6 due to the increased hardness and tensile strength, and our AR-15 Router Jig will make short work of either!

Forged 80% lowers, sometimes referred to as "Mil-Spec" lower receivers are manufactured in a very different manner than billet 80% lowers. All forged 80% lowers start as "receiver blanks" that are formed (forged) under high heat and pressure into the general shape of an 80% lower. There are only a handful of companies in the USA that are responsible for producing the majority of receiver blanks, which are then sold to machine shops and firearms manufacturers for finish machining. All forged AR-15 80% lowers are 7075-T6. The finished quality of a forged 80% lower depends entirely on a number of factors, starting with the finish machining. Our Forged AR-15 80% lowers are precision CNC machined to tolerances of +/- .001" and inspected thoroughly to ensure consistent quality. Next, consider the presence and quality of the FIRE/SAFE engraving. Our 80% lowers have the FIRE/SAFE markings present, engraved deeply in large, bold print. Finally, the quality of the hardcoat anodizing finish can make or break your build. A consistent, deep black finish that will match well with other hardcoat anodized components should be a major consideration. Our forged AR-15 80% lower receivers will arrive with a quality and consistent Type III Class 2 black hardcoat anodized finish completed per the standards set forth by MIL-A-8625.

At 5D Tactical, we carry essential AR-15 80% lower parts including receivers, Mil-Spec lower parts kits, and upper/lower matched sets. From the Engraved AR-15 Forged 7075-T6 80% Lower Receiver to our lightweight Billet AR-15 6060-T6 80% Lower Receiver with the look and feel of a Mil-Spec Lower receiver, we offer a selection of AR-15 80% lowers in a variety of styles.

Finish Your AR-15 Project Right Away

We have Billet and Forged AR-15 80% lower receivers that are ready for your next custom rifle build project. Our lower receivers are precision CNC machined and come with high-strength grade aluminum. Whether you want matched sets for upper-lower assembly or a complete lower parts kits, we bring you superior products that you can always count on for reliable fit and finish.

Whether you’re looking to build or upgrade a complete AR-15 80% lower, we have you covered.

Buy Specialized AR-15 Parts

At 5D Tactical, we have been specializing in AR-15s for many years. We employ firearms experts with over 40 years of experience, who are happy to answer any of your questions about your next build. Do you want a forged stripped upper and 80% lower matched set? We have a complete set for your AR 15 80 percent lower receiver and upper receiver build project.

Order your AR-15 80% Lower Receiver and the Mil-Spec AR-15 Lower Parts Kit today and enjoy free shipping on orders over $200!