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59 of 59 Items
  • Magpul® MOE+® AR15/M4 Grip Magpul® MOE+® AR15/M4 Grip Magpul® MOE+® AR15/M4 Grip

    Magpul® MOE+® AR15/M4 Grip

    Magpul® has built quite a name for themselves over the years with their aftermarket AR platform furniture and add-ons. Take their MOE® grip for your AR. It feels great, the grip angle is miles ahead of the standard A2 grip your AR probably came...

    $23.99
  • Magpul MOE-K2® Grip – AR15/M4 Magpul MOE-K2® Grip – AR15/M4-2

    Magpul MOE-K2® Grip – AR15/M4

    The Magpul MOE-K2 Grip offers a full size design that has a steeper vertical grip angle compared to the previous model, the MOE-K. With a steeper vertical grip angle allowing the shooter's hand to be positioned closer to the body, aggressive TSP texture,...

    $20.95
  • WMD Guns NiB-X Lower Parts Kit, Mod 3

    WMD Guns NiB-X Lower Parts Kit, Mod 3

    Even minor changes to an AR's lower parts kit can make someone get more out of their shooting experience. This lower parts kit by WMD Guns is mil-spec save for one detail: the trigger, hammer, and disconnector have all been coated in nickel boron. Their...

    $119.99
  • Spike's Tactical - AR-308 Lower Parts Kit

    Spike's Tactical - AR-308 Lower Parts Kit

    The Spike's Tactical AR-308 Lower Parts Kit sports military-grade hardware (minus that third safety position) with a great fit and finish. This parts kit is manufactured for Spike's Tactical's forged sets and may not be compatible with any other large...

    $79.99
  • Bravo Company AR-15 Trigger Assembly - PNT, Nickel

    Bravo Company AR-15 Trigger Assembly - PNT, Nickel

    It's time to get serious about your AR's trigger. Two words: Bravo Company. And this is their PNT Trigger Assembly. Sure it's been given a nickel finish, but that's not all. The interacting surfaces of its individual parts have also been coated in PNT,...

    $64.99
  • MOE+® EPT SBA3 Lower Build KIt

    MOE+® EPT SBA3 Lower Build KIt

    If you plan to build an AR-15 in pistol configuration, we can help you build out the lower half of your rifle while keeping you legal at the same time. To help you out, we've put together this MOE+® EPT SBA3 Lower Build Kit. It's got everything you...

    $219.99
  • Strike Industries Enhanced Lower Parts Kit

    Strike Industries Enhanced Lower Parts Kit

    If you've got a worn out or mil-spec lower parts kit in your AR-15 that needs replaced, or if you just want to refresh the controls on your rifle, you need to get the Strike Industries Enhanced Lower Parts Kit. It'll rejuvenate your lower assembly and...

    $104.99
  • Magpul PRS® GEN3 Precision-Adjustable Stock

    Magpul PRS® GEN3 Precision-Adjustable Stock

    The Magpul PRS GEN3 Precision has Melonite finished steel shafts that prevent corrosion and wear, offering the ability to adjust the length of pull and the cheek piece via aluminum detent knobs. This stock includes a non-slip rubber butt-pad that reduces...

    $254.95
  • Spike's Tactical Lower Parts Kit for .223/5.56

    Spike's Tactical Lower Parts Kit for .223/5.56

    The mil-spec lower parts kit is good enough. It does the job it's meant to do. The trigger, hammer, disconnector, detents, springs, and roll pins are perfectly suited to the job of making your lower (and the rest of your AR) work as intended. In keeping...

    $89.99
  • Magpul MIAD Mission Adaptable Grip Magpul MIAD Mission Adaptable Grip

    Magpul MIAD Mission Adaptable Grip

    Got a preference for how you think an AR grip should feel? Yeah, anything but the original mil-spec grip, right? We hear ya. Fortunately, Magpul heard ya too. That's why they have the MIAD, the Mission Adaptable grip for your AR. It's just as great as...

    $34.99
  • Spike's Tactical Pro Grip Spike's Tactical Pro Grip-2

    Spike's Tactical Pro Grip

    Replace that mil-spec uncomfortable grip on your AR with the Pro Grip by Spike's Tactical. It has an ergonomically correct feel and has been shaped and contoured to fit your hand's natural grip, to make your hand and your rifle fit together like they're...

    $24.99
  • Rise Armament RA-140 Super Sporting Drop-In Trigger Rise Armament RA-140 Super Sporting Drop-In Trigger

    Rise Armament RA-140 Super Sporting Drop-In Trigger

    The Affordable, Must-Have Trigger Most factory AR triggers are alright. They get the job done. Sort of. If you’re reading this, then your trigger probably feels gritty, sticky, and inconsistent and for a rifle that should punch out to over 400...

    $129.00
  • Aero Precision AR15 Enhanced Carbine Buffer Kit Aero Precision AR15 Enhanced Carbine Buffer Kit Aero Precision AR15 Enhanced Carbine Buffer Kit

    Aero Precision AR15 Enhanced Carbine Buffer Kit

    You need a buffer tube assembly on your AR-15. And usually it's nothing "special." You screw parts onto other parts, and it serves its purpose as part of your AR. You spend your hard-earned money on these parts, so it'd be nice if they'd do more for you...

    $54.99
  • Aero Precision M5 .308 Standard Lower Parts Kit

    Aero Precision M5 .308 Standard Lower Parts Kit

    If you're starting an LR-308 build, you'll need a good lower parts kit. Aero Precision makes a lower parts kit designed for their M5, which is their own proprietarily designed .308 rifle that can also work with your LR-308 build, provided yours is based...

    $99.99
  • Aero Precision M5 .308 Enhanced Lower Parts Kit

    Aero Precision M5 .308 Enhanced Lower Parts Kit

    If you're starting an LR-308 build, you'll need a good lower parts kit. It'd also be nice if your lower parts kit came with a grip that was more comfortable than the standard A2 grip. Aero Precision makes a lower parts kit designed for their M5, which is...

    $134.99
  • Magpul CTR® Carbine Stock – Mil-Spec Magpul CTR® Carbine Stock – Mil-Spec 2 Magpul CTR® Carbine Stock – Mil-Spec 3

    Magpul CTR® Carbine Stock – Mil-Spec

    The Magpul CTR Carbine Stock has a light, anti-snag, A-framed design that protects the latch from accidentally releasing. The removable rubber butt-pad prevents slippage when pressed against the shoulder along with the CTR having a sloped cheek weld for...

    $59.95
  • Sylvan Arms AR-15 QD Backplate Sylvan Arms AR-15 QD Backplate

    Sylvan Arms AR-15 QD Backplate

    So you've seen the benefits of using a QD sling for your AR-15, and now you want to upgrade. You're on the right track, but where do you attach it, and what if you're left handed? If you prefer to keep your AR tight and close to your body, you'll want to...

    $24.99
  • Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube

    Aero Precision AR15/AR10 Enhanced Carbine Buffer Tube

    You may consider the buffer tube to be nothing fancy, and "just one of the pieces" you need to make your AR-15 build work. And while it's true you need one, it can be true at the same time that having the right one can enhance your building and shooting...

    $39.99
59 of 59 Items

 All the parts you need to get your AR's lower ready for an upper.

The piece-by-piece nature of building the AR-15 can get a little overwhelming, especially if it's your first time. That's why we've compiled all the AR-15 parts that you need to complete the "lower half" of your rifle or pistol. With a fully built lower assembly, you can attach a barreled upper receiver, slap in a magazine, and start hitting targets at the local range.

Parts Required to Finish Your Lower

In addition to a fabricated 80% lower receiver or AR-15 stripped receiver bought from an FFL, you'll need the following components which can all be found right here:

  • Buffer tube
  • Buffer
  • Recoil spring
  • Butt stock or brace
  • Lower parts kit (includes hammer, trigger, safety, springs and pins)

Drop-in Trigger Upgrades

One of the easiest ways to upgrade your AR before you even finish your build is by simply swapping out your factory trigger setup for a drop-in unit, like the ones available from ACT and Rise Armament. These self-contained triggers include the trigger, disconnector, and hammer preinstalled. All you need to do is drop the unit into the receiver, and tap in your pins!

Need help with assembly? Here's how to install the AR-15 lower parts kit.

 


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DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At 80-Lower.com, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

 

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.