80% Lowers and Jigs
80% Lower Jigs

80% Lower Jigs

Universal 80% Lower Receiver Jigs for the AR-15/AR-9 and AR-308/AR-10.
80% Lower Recievers

80% Lower Recievers

AR-15/AR-9 and AR-308 80% Lower Receivers featuring custom billet lowers by 5D Tactical.

Featured Categories

80% Lower Jigs

80% Lower Jigs

Universal 80% Lower Receiver Jigs for the AR-15/AR-9 and AR-308/AR-10.
80% Lower Recievers

80% Lower Recievers

AR-15/AR-9 and AR-308 80% Lower Receivers featuring custom billet lowers by 5D Tactical.
80% Glock

80% Glock

80% Glock Frames and complete 80% Glock Build Kits.
Uppers

Uppers

AR-15 and AR-308/AR-10 Stripped and Complete Upper Receivers.
Build Kits

Build Kits

Complete 80% Build Kits contain everything you need for your next 80% build!
Tooling

Tooling

Custom designed end mill, drill bits, and more for finishing your 80% lower.

Upgrade Your Firearm with 5D Tactical

5D Tactical supplies essential equipment for building your own AR-15, AR-9 or AR-308/AR-10 firearms, including upper receivers and 80 percent lower receivers, 80% lower jigs, tools and jig replacement parts. We have the product lines, capabilities and expertise to assist you in finishing flawless 80 percent lowers. You provide the router and drill, we supply the rest.

What are the benefits of building your own ar?

Our 80% lower jig is universal for all 80 percent lowers and comes with our Universal Fitment Guarantee. You can shop with the peace of mind at 5D Tactical, there’s no need to practice trial and error when shopping for parts fitment as all our products are mil-spec.

To get started on building your AR-15 or AR-308/AR-10, order everything you need (jig, tools, and receivers) straight from our online store, or call us today at 508.834.4223

Complete your AR, and enjoy a firearm that delivers reliable performance that you can take pride in knowing you truly built it yourself!

Finishing 80% lower receivers doesn’t require special training. You simply need the right tools for the job. Our jigs and tools allow you to quickly and easily finish machine flawless lower receivers without the need for expensive specialist equipment.

In addition to cutting costs our 80% lower jig puts you in control of the work, letting you ensure the job is done perfectly for your next build. With our 80% lower jig, comprehensive instructions and how-to videos, you get to control production quality by performing the work firsthand.

Our equipment provides the capability to swiftly complete an 80% lower receiver, with unparalleled precision. The Router Jig Pro can be assembled fast and ready to be used in just a few minutes. Once you’re familiar with the user-friendly process, you can finish an 80 lower receiver and begin installing the lower parts kit in as little as 30 minutes!

80 Percent Lower Receivers For Sale

Many people are interested in building their own AR model carbines but are uncertain of how to even begin. 80% lower receivers are a great way to get into the world of firearms without breaking your budget.

80 lowers (also referred to as "unfinished receivers" or "unfinished lowers") are DIY projects that only require only minor machining before they can be shaped into fireable weapons. Unfortunately, there’s a lot of information --- and misinformation --- out there concerning 80% lower receivers that can be hard to sort through.

Fortunately, at 5D Tactical, our mission is to empower firearms enthusiasts to efficiently build their own AR models. Therefore, we’ve waded into this sea of information so you don’t have to.

80% Lower FAQs

Private gun owners can turn to 80% lowers to reduce the work required for producing a workable firearm. However, to ensure that you produce quality work, it’s vital that you understand the subject matter.

What is an 80% Lower Receiver?

An 80% lower receiver is a portion of a firearm that needs to be completed with 20% work before it can be used in a functional weapon. Home gun builders use these incomplete components to make their own firearms from the comfort of their personal workshops.

Rifles and carbines, like the M16, M4, or AR-15, consist of two main systems: the upper receiver and the lower receiver. A lower receiver (or simply "a lower") typically consists of the grip, trigger mechanism (bolt, hammer, etc.), and stock of the weapon.

Is an 80% Lower Receiver a Firearm?

No, an 80 lower is not a firearm according to the ATF. However, some states have taken it upon themselves to pass legislation to limit the purchase, possession and transfer of 80% receivers which is stricter than the current federal regulations.

Please note that we are not attorneys so be sure to do your own research and stay apprised of all your state and local laws prior to completing a purchase.

The "80%" designation indicates that the lower is not a firearm because it’s missing 20% of the vital machining that it needs to operate as a firearm. An 80% lower receiver only becomes a firearm, by law, once the fire control cavity is milled out with an 80% lower jig.

Do I Need a License for an 80% Lower Receiver Kit?

No, buyers do not need any sort of license to purchase an 80 lower or any sort of 80 lower receiver kit. This is because 80 lowers are not legally considered as firearms which is why they can be purchased online and shipped directly to your front door!

Customers who use our products

We cater to firearms enthusiasts nationwide. Our products are used by AR lovers who enjoy building custom firearms with aftermarket parts, gun owners who practice self-armament by building their own rifles, and those who enjoy building ARs for the love of gun mechanics.

Get started on your ar build today

Lower receivers house some of the most important parts of a firearm, making it essential to mill them with precision equipment that supports the functionality of the mechanisms within. This is exactly what our 80% lower jig for 80 percent lower kits and custom tools help you do.

Benefits of building your own AR

No special training required. You simply need the right tools for the job. While the tools aren’t hard to use, a truly fast and easy solution did not exist, until now. Our jigs and tools allow you to quickly and easily finish machine flawless lower receivers without the need for expensive specialist equipment.