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AR Lower Parts

56 of 56 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...

    $22.75
  • Ergo Grip, Tactical Deluxe SureGrip for AR-15/M-16

    Ergo Grip Tactical Deluxe SureGrip for AR-15/M-16

    If you're like the rest of us, you find the mil-spec A2 grip that came standard on your AR severely lacking in the area of comfort. Its hard plastic never really gets comfortable, and its angle and texture don't stop your from getting fatigue, especially...

    $59.99
  • Leapers, Inc. - UTG, UTG PRO, Ambidextrous Grip Leapers, Inc. - UTG, UTG PRO, Ambidextrous Grip Leapers, Inc. - UTG, UTG PRO, Ambidextrous Grip Leapers, Inc. - UTG, UTG PRO, Ambidextrous Grip

    UTG PRO Ambidextrous Grip by Leapers, Inc.

    Get more out of your AR-15's grip, and get it to do more for you. This is the UTG PRO Ambidextrous Grip by Leapers Inc. Aside from polymer construction, it's been molded with excellent ergonomics to reduce fatigue, and so you can really get an...

    $14.97
  • Ergo Grip Sure Grip for AR-15/M16 Ergo Grip Sure Grip for AR-15/M16

    Ergo Grip Sure Grip for AR-15/M-16

    If you're someone who frequently uses your AR for long durations, then comfort is paramount. You need to reduce fatigue in your grip hand however possible. With that in mind, Ergo Grip gives your their Sure Grip for AR-15/M-16. First, it's shaped and...

    $21.55
  • Magpul MOE-K2+® Grip – AR15/M4 Magpul MOE-K2+® Grip – AR15/M4-2

    Magpul® MOE-K2+® Grip - AR15/M4

    The Magpul MOE-K2+ Grip has a durable rubber mold wrapping around the hard polymer body, preventing snags and damage, which allows this grip to outlast in rugged environments. The MOE-K2+ offers a steeper vertical grip angle allowing the shooter's hand...

    $23.70
  • PSA MOE SBA3 Lower Assembly Kit 1 PSA MOE SBA3 Lower Assembly Kit 2 PSA MOE SBA3 Lower Assembly Kit 3 PSA MOE SBA3 Lower Assembly Kit 4 PSA MOE SBA3 Lower Assembly Kit 5

    PSA MOE SBA3 Lower Build Kit

    Whether you're getting your stripped lower receiver ready to build an AR-15 pistol or just want to change things up and convert your SBR into a pistol, we've got just the kit for you. With the all-inclusive SBA3 lower assembly, you'll receive parts from...

    $179.99
  • 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,...

    $19.90
  • ALG Defense QMS Quality Mil-Spec Trigger

    ALG Defense QMS Quality Mil-Spec Trigger

    Some of us like our AR platform rifles traditional or built as close to mil-spec as possible. We build replicas of that Colt model 629 or of the old-school M-16, because we want that nostalgia when we shoot. There's just one problem: the mil-spec...

    $49.00
  • 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...

    $44.99
  • Gun Nuts® Pro Line Fire Control Group Gun Nuts® Pro Line Fire Control Group Gun Nuts® Pro Line Fire Control Group Gun Nuts® Pro Line Fire Control Group

    Gun Nuts® Pro Line Fire Control Group

    The Pro Line FCG: OEM compatibility with tier-one performance. A simple hammer and trigger upgrade is one of the most overlooked AR-15 upgrades -- and it's one of the easiest and most effective ways to improve your AR's reliability and accuracy. Enter...

    $26.99
  • Gun Nuts®  0# $#!+ Kit - Lower Parts Kit Gun Nuts®  0# $#!+ Kit - Lower Parts Kit Gun Nuts®  0# $#!+ Kit - Lower Parts Kit Gun Nuts®  0# $#!+ Kit - Lower Parts Kit

    Gun Nuts® 0# $#!+ Kit - Lower Parts Kit

    Lost that tiny lil' spring? You're in the right place. The "OH $#!+" Lower Parts Kit provides replacement components for the AR-15 lower receiver's springs, pins, and detents -- including all the parts most likely to get lost or damaged during the...

    $11.99
  • Strike Industries Enhanced Lower Parts Kit

    Strike Industries Enhanced Lower Parts Kit

    The Strike Industries Enhanced Lower Parts Kit is an excellent mil-spec+ LPK. It includes an ambidextruous safety selector and quality, machined components that provide smooth, reliable operation. Additional Features: Enhanced Bolt Catch Strike Magazine...

    $72.95
  • Magpul PRS® GEN3 Precision-Adjustable Stock

    Magpul® PRS® GEN3 Precision-Adjustable Stock

    The Magpul PRS GEN3 Precision-Adjustable Stock is the ultimate shoulder rest for enhanced AR accuracy. With a built-in cheek riser, adjustable rubber pad for recoil mitigation, precision adjustment knobs, and mil-spec tube fitment, the PRS GEN3 allows...

    $239.99
  • Spike's Tactical Lower Parts Kit for .223/5.56

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

    The Spike's Tactical Lower Parts Kit provides reliable operation inside any AR-15's 80% lower or stripped lower receiver without breaking your budget. Its mil-spec fitment and springs ensure you get a clean, repeatable trigger and hammer reset for good...

    $71.96
  • 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...

    $34.15
  • 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...

    $17.96
  • Gun Nuts® Ambidextrous Sporter Lower Parts Kit Gun Nuts® Ambidextrous Sporter Lower Parts Kit Gun Nuts® Ambidextrous Sporter Lower Parts Kit Gun Nuts® Ambidextrous Sporter Lower Parts Kit

    Gun Nuts® Ambidextrous Sporter Lower Parts Kit

    Features a notched hammer and ambidextrous safety. Combine the best of old-school ARs with the ergonomics of a modern parts kit with the Sporter Ambi LPK from Gun Nuts. Features an original notched hammer, for compatibility with unshrounded bolt carriers...

    $105.99
  • Gun Nuts® Ambidextrous Pro Line Lower Parts Kit Gun Nuts® Ambidextrous Pro Line Lower Parts Kit Gun Nuts® Ambidextrous Pro Line Lower Parts Kit Gun Nuts® Ambidextrous Pro Line Lower Parts Kit

    Gun Nuts® Ambidextrous Pro Line Lower Parts Kit

    Precision machining, ambidextrous safety. The Pro Line Ambidextrous AR-15 LPK provides the best in American engineering, affording precision-cut fire control components that ensure the highest reliability out of the box. Coupled with an ambi safety,...

    $87.99
  • Gun Nuts® Pro Line Lower Parts Kit Gun Nuts® Pro Line Lower Parts Kit Gun Nuts® Pro Line Lower Parts Kit Gun Nuts® Pro Line Lower Parts Kit

    Gun Nuts® Pro Line Lower Parts Kit

    Precision machining for improved performance. The Pro Line AR-15 LPK provides the best in American engineering, affording precision-cut fire control components that ensure the highest reliability out of the box. Coupled with a consistent, smooth trigger...

    $72.99
  • Gun Nuts® Sporter Lower Parts Kit Gun Nuts® Sporter Lower Parts Kit Gun Nuts® Sporter Lower Parts Kit Gun Nuts® Sporter Lower Parts Kit

    Gun Nuts® Sporter Lower Parts Kit

    Features a notched hammer and precision-machined parts. Combine the best of old-school ARs with the ergonomics of a modern parts kit with the Sporter LPK from Gun Nuts. Features an original notched hammer, for compatibility with unshrounded bolt carriers...

    $93.99
  • Gun Nuts® Sporter Fire Control Group Gun Nuts® Sporter Fire Control Group Gun Nuts® Sporter Fire Control Group Gun Nuts® Sporter Fire Control Group

    Gun Nuts® Sporter Fire Control Group

    Features an O.G. Sporter Hammer, for unshrouded bolt carriers. Got an old Colt or Bushmaster bolt carrier group? Want a modern, reliable reproduction notched hammer? You've found the right kit: The Gun Nuts Sporter Fire Control Group features a replica...

    $40.99
  • Aero Precision AR15 Enhanced Lower Parts Kit

    Aero Precision AR15 Enhanced Lower Parts Kit

    Aero Precision's Enhanced LPK includes some simple but effective upgrades, like a Magpul MOE pistol grip, and custom billet trigger guard. This kit includes precisely CNC-machined components with tight tolerances to ensure reliable operation once...

    $67.99
  • MOE+® EPT SBA3 Lower Build KIt

    MOE+® EPT SBA3 Lower Build KIt

    If you want to build AR-15 pistol, you'll want the MOE+® EPT SBA3 Lower Build Kit. It's got everything you need to finish the lower receiver. This kit includes a Magpul® MOE+® grip and MOE® trigger guard, plus a lower parts kit with a...

    $199.99
56 of 56 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 AR's 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)

New builder? Use our Master guide to pick the right lower parts.

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.

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