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36 of 104 Items
  • Sale
    Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)

    Mil-Spec AR15 Lower Parts Kit (w/ Hammer and Trigger)

    Want an AR-15 trigger that suffers no creep, take-up, or over-travel? Looking for the easiest-to-install LPK? How about the most affordable parts kit possible? The mil-spec AR-15 LPK comes in at a low-price with machining and performance that truly feels...

    Was: $49.99
    Now: $39.99
  • Sale
    Adjustable Carbine Stock & Buffer Tube Assembly Adjustable Carbine Stock & Buffer Tube Assembly Adjustable Carbine Stock & Buffer Tube Assembly Adjustable Carbine Stock & Buffer Tube Assembly

    Adjustable Carbine Stock & Buffer Tube Assembly

    No 80% lower receiver build is complete without a buttstock kit. This buttstock kit includes both an adjustable carbine stock and buffer tube assembly. The classic adjustable carbine stock is constructed from a durable polymer composite and is designed...

    Was: $39.99
    Now: $24.99
  • Sale
    KAK-308-LPK

    LR-308/AR-10 Lower Parts Kit (w/ Hammer and Trigger)

    We strive to provide the most accurate photographs of our product whenever possible. Due to availability limitations and supply chain constraints, slight variations of the trigger and hammer finsh (stainless or black) may occur.  Want an LR-308...

    Was: $69.99
    Now: $59.99
  • Sale
    mil-spec-ar-15-butt-stock-1

    Mil-spec AR-15 Butt Stock

    Features: Mil-spec dimensions (commercial variant) Can accomodate six-position buffer tubes Fits all standard-sized AR buffer tubes

    Was: $9.99
    Now: $7.99
  • Sale
    Magpul  MOE® Mil-Spec Carbine Stock Magpul  MOE® Mil-Spec Carbine Stock Magpul  MOE® Mil-Spec Carbine Stock Magpul  MOE® Mil-Spec Carbine Stock

    Magpul® MOE® Mil-Spec Carbine Stock

    There's a reason Magpul is amazing at what they do. Their parts are extremely rugged, just as tough if not tougher than mil-spec stuff, and they weigh a hell of a lot less. The Magpul MOE® Mil-Spec Carbine Stock is no different. It's light, it's...

    Was: $39.95
    Now: $34.95
  • Premium AR-15 Lower Parts Kit Premium AR-15 Lower Parts Kit 2 Premium AR-15 Lower Parts Kit 3 Premium AR-15 Lower Parts Kit 4

    Premium AR-15 Lower Parts Kit

    A lower parts kit is essential to finishing your 80% lower. To have multiple build kits, or lower receivers to swap out on your AR-15 rifle, it’s crucial to have multiple lower parts kits. Sure there are no fancy color coded bags, but rest assured...

    $63.99
  • KAK AR15 LPK - Missing Parts Kit

    AR15 LPK Missing Parts Kit

    This AR15 LPK Missing Parts Kit has all the essentials for any lost parts, replacement parts, or for your next custom build. All parts are proudly made in the USA. This LPK Missing Parts Kit comes with: (1) buffer retainer (1) buffer retainer spring (1)...

    $9.99
  • SBA3 MOE Pistol Lower Build Kit

    SBA3 MOE Pistol Lower Build Kit

    Looking for the perfect way to upgrade your AR pistol? Complete your AR-15 pistol build the right way with the SBA3 MOE Pistol Lower Build Kit! Features a quality pistol brace by SB Tactical and an upgraded lower parts kit. This SBA3 MOE Pistol Lower...

    $229.99
  • 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
  • ar-15-fully-stripped-upper-receiver-1 ar-15-fully-stripped-upper-receiver-2 ar-15-fully-stripped-upper-receiver-3 ar-15-fully-stripped-upper-receiver-4 ar-15-fully-stripped-upper-receiver-5

    AR-15 Forged Stripped Upper Receiver

    Ready to piece together your own AR? Finished up your 80% lower or stripped lower and want to assemble your own upper receiver piece by piece? Start with quality: Grab one of our forged, mil-spec (7075-T6) "Flattop" stripped AR-15 upper receivers. This...

    $54.99
  • Rise Armament RA-LE145 Tactical Drop-In Trigger Rise Armament RA-LE145 Tactical Drop-In Trigger

    Rise Armament RA-LE145 Tactical Drop-In Trigger

    The Operator’s Go-To Trigger If you’re the operator, LEO, or hunter that needs one of the most upgraded and dependable triggers available, the LE145 Tactical Trigger from Rise Armament should be your top choice. This drop-in, single-stage...

    $159.00
  • UTG Ultra Slim Angled M-LOK Foregrip UTG Ultra Slim Angled M-LOK Foregrip UTG Ultra Slim Angled M-LOK Foregrip UTG Ultra Slim Angled M-LOK Foregrip UTG Ultra Slim Angled M-LOK Foregrip

    UTG Ultra Slim Angled M-LOK Foregrip, Matte Black

    This Ultra Slim Angled MLOK Foregrip from UTG is constructed from 6061-T6 Aluminum and anodized with a matte black finish. It is compatible with M-LOK style rails, shrouds, and hand guards. This angled foregrip provides a very comfortable, forward grip...

    $29.99
  • AR15 LPK - Basic Build Kit

    AR15 LPK - Basic Build Kit

    The Kak Industry AR15 Lower Parts Kit comes with all of the basic essentials you'll need for your own custom AR15 build. This build kit includes the following: bolt catch kit magazine catch kit hammer & trigger pins pivot pin & detent &...

    $29.99
  • Magpul® MOE® AR-15 Build Kit Magpul® MOE® AR-15 Build Kit 2 Magpul® MOE® AR-15 Build Kit 3 Magpul® MOE® AR-15 Build Kit 4 Magpul® MOE® AR-15 Build Kit 5

    Magpul® MOE® AR-15 Lower Build Kit

    Welp, we outdid ourselves this time. This here's one helluva kit. Once you've grabbed a stripped lower (sold separately) this parts kit will provide the internals for that other half of your AR build. Finished. Finito. Completo. We added some mil-spec...

    $119.99
  • Sylvan Arms ARH300 Folding Stock Adapter Sylvan Arms ARH300 Folding Stock Adapter Sylvan Arms ARH300 Folding Stock Adapter Sylvan Arms ARH300 Folding Stock Adapter Sylvan Arms ARH300 Folding Stock Adapter

    Sylvan Arms Folding Stock Adapter (ARH300)

    Trick out your AR-15 by making it more easily stowable to carry with you to the range. Sick of carrying around huge bulky rifle bags and cases? Wish your rifle was short enough and small enough to fit into something smaller? Shorten it for travel with...

    $209.99
  • Magpul®  MOE® Enhanced AR15/M4 Polymer Trigger Guard Magpul®  MOE® Enhanced AR15/M4 Polymer Trigger Guard Magpul®  MOE® Enhanced AR15/M4 Polymer Trigger Guard

    Magpul® MOE® Enhanced AR15/M4 Polymer Trigger Guard

    Stop installing that mil-spec aluminum trigger guard on every AR you build. The Magpul® MOE® Enhanced AR15/M4 Polymer Trigger Guard is way better. Why? For starters, it's super ergonomic and gives your trigger finger much more room which is great...

    $9.95
  • 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
  • JMT Single Stage Drop-In 3.5-4 Ib Trigger - Saber JMT Single Stage Drop-In 3.5-4 Ib Trigger - Saber 2 JMT Single Stage Drop-In 3.5-4 Ib Trigger - Saber 3 JMT Single Stage Drop-In 3.5-4 Ib Trigger - Saber 4

    JMT Single Stage Drop-In 3.5-4 Ib Trigger - Saber

    If you're looking for a simple, yet effective upgrade to your AR to get you out of mil-spec territory with your trigger, then hold up right here. You need to see this. This is the Saber. It's JMT's Single Stage Drop-In 3.5-4 lb Trigger, and it'll...

    $99.99
  • Aero Precision AR15 Enhanced Lower Parts Kit

    Aero Precision AR15 Enhanced Lower Parts Kit

    For your next AR-15 build, you should start with a quality lower parts kit, so you don't have to replace it later. Aero Precision gives you their AR-15 Enhanced Lower Parts Kit to start your build off with. It's a quality kit, and also comes upgraded...

    $114.99
  • Magpul M-LOK® MVG® Vertical Grip

    Magpul M-LOK® MVG® Vertical Grip

    The Magpul M-LOK MVG Vertical Grip is a reinforced hard polymer material that attaches directly to M-LOK handguards and forends. The TSP texture and lightweight design allows for optimal control in any environment. Additional Features: Length: 3.0 in...

    $22.95
  • Magpul® MOE® Carbine Stock & Buffer Tube Assembly Magpul® MOE® Carbine Stock & Buffer Tube Assembly 2 Magpul® MOE® Carbine Stock & Buffer Tube Assembly 3 Magpul® MOE® Carbine Stock & Buffer Tube Assembly 4 Magpul® MOE® Carbine Stock & Buffer Tube Assembly 5

    Magpul® MOE® Carbine Stock & Buffer Tube Assembly

    Get all the parts you need to finish off the rear end of your AR in one convenient package. This bundle we've put together comes with our buffer tube assembly, but that's not all. The icing on the cake is that you get a Magpul® MOE® Carbine Stock...

    $59.99
  • Magpul MOE® AR15/M4 Grip

    Magpul MOE® AR15/M4 Grip

    Let's face it. The AR-15 for how amazingly modular it is and how it can adapt to any situation, falls short in one key area: the grip is bad. It doesn't care if you're comfortable holding it or not. Not to mention the angle is horrible. The way an AR's...

    $19.95
  • r-j-single-stage-drop-in-trigger-1 r-j-single-stage-drop-in-trigger-2 r-j-single-stage-drop-in-trigger-3 r-j-single-stage-drop-in-trigger-4 r-j-single-stage-drop-in-trigger-5

    Single Stage Drop-In Trigger

    Look, everybody knows you need a trigger to make your AR do its job. And while all those mil-spec triggers out there that come in who knows how many lower parts kits do their job adequately, that's just it. They're just "adequate." Time to step it up and...

    $149.99
36 of 104 Items

Quality AR parts kits, triggers, receivers, handguards, BCGs, and AR-15 accessories.

Welcome to the parts counter. Need some roll pin punches to complete that LPK install? Or maybe you want to ensure your handguard's on snug and torqued to spec. Need to upgrade your new black rifle (or pistol) build with a better trigger, grip, or sights? We've got you covered. No 80% lower project is going to be easy without the right tools, so we sourced all the extra bits and components you'll probably need to make the job easier.

Triggers & Receiver Components

Once you've fabricated that shiny new 80% lower for your AR build (or even if you just bought a stripped lower), you've got to outfit it with all the components required to make it function: A trigger, hammer, disconnector, safety, and all those little springs and pins. Make it easy and remove the guesswork by checking out our selection of mil-spec AR lower parts for your .223, 9mm, or .308 80% lower receivers. We also carry a selection of pistol braces and buttstocks to throw on that naked buffer tube.

Need better groupings? The easiest way to upgrade your new AR build is with a drop-in trigger. We carefully selected some of the best units on the market. Any of these drop-in trigger units will reduce trigger pull and creep, minimize or even eliminate takeup and over-travel, and provide more consistent trigger pulls so you can land rounds more precisely. Best of all? They install easily and they're incredibly affordable. It's one of the first upgrades we recommend, especially if you're installing a lower parts kit.

Building an AR piece by piece? We've got you covered. Grab one of our mil-spec, forged, stripped uppers and a quality M16 bolt carrier group to get started. Pair it all up with a nice free-float, lightweight handguard and then all you need to do is pick a barrel to send rounds downrange. You don't have to purchase a complete build kit from us. We love supporting builders who choose to assemble their own uppers.

Grab Your Gunsmithing Tools, Too!

Ever try to install an LPK without punches? You probably wound up losing some of those tiny roll pins, halting your build. Get rid of the frustration and guesswork and grab the tools you need to confidently attack your 80% project. We've got quality Armorer's Wrenches, torque wrenches, roll pin kits, vise blocks, and all the other gunsmithing tools you need to go from a hunk or aluminum or polymer to a locked n' loaded shooter. Grab a complete Armorers Kit like the Wheeler set, and you'll have virtually all the tools required.

 


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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.