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36 of 103 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: $46.79
    Now: $38.99
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    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: $76.79
    Now: $63.99
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    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)...

    Was: $11.99
    Now: $9.99
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    SBA3 MOE Pistol Lower Build Kit

    SBA3 MOE Pistol Lower Build

    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...

    Was: $214.99
    Now: $209.99
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    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: $16.79
    Now: $13.99
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    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 &...

    Was: $32.39
    Now: $26.99
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    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...

    Was: $10.79
    Now: $8.99
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    AR-15 A2 "Birdcage" .223/5.56mm Flash Hider AR-15 A2 "Birdcage" .223/5.56mm Flash Hider

    AR-15 A2 "Birdcage" .223/5.56mm Flash Hider

    Your AR-15 needs a solid muzzle device right out of the gate to get your build up and running. The AR-15 A2 "Birdcage" .223/5.56mm Flash Hider is the jack of all trades when it comes to muzzle devices. Due to its 5-port design, it adequately conceals the...

    Was: $10.79
    Now: $8.99
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    UTG® Quick Install Dust Cover -  .223/5.56,  Black UTG® Quick Install Dust Cover -  .223/5.56,  Black 2 UTG® Quick Install Dust Cover -  .223/5.56,  Black 3 UTG® Quick Install Dust Cover -  .223/5.56,  Black 4 UTG® Quick Install Dust Cover -  .223/5.56,  Black 5

    UTG® Quick Install Dust Cover - .223/5.56, Black

    Installing a dust cover onto your AR's upper receiver can be a pain. If you're starting with just parts, you need to install the C-clamp onto the rod without launching it across the room and never seeing it again. Then you thread the rod through the...

    Was: $11.99
    Now: $9.99
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    AR15 Tapered Steel Crush Washer 1/2"x28 AR15 Tapered Steel Crush Washer 1/2"x28  2

    AR15 Tapered Steel Crush Washer 1/2"x28

    If you plan to go the traditional (and the easiest) route with the business end of your .223 or 5.56mm chambered AR by installing a muzzle device, you'll need a crush washer. This is that crush washer. You simply slide it onto the threading of your...

    Was: $1.91
    Now: $1.59
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    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: $45.59
    Now: $37.99
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    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...

    Was: $22.79
    Now: $18.99
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    AR15 Low-Profile Gas Block - .750" AR15 Low-Profile Gas Block - .750" 2 AR15 Low-Profile Gas Block - .750" 3

    AR15 Low-Profile Gas Block - .750"

    Every gas-operated AR (those that don't employ a piston system) needs a gas block of some type to cycle between shots. If you're building an old-school or retro style AR, it may have a fixed front sight that doubles as the gas block or some fold-up...

    Was: $17.99
    Now: $14.99
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    AR-10 / LR-308 .308 Tactical Charging Handle AR-10 / LR-308 .308 Tactical Charging Handle AR-10 / LR-308 .308 Tactical Charging Handle

    AR-10 / LR-308 .308 Tactical Charging Handle

    Fact: you need a charging handle to put your AR-10 (Colt's proprietary design) or LR-308 (the other 90% of all .308 sized AR rifles out there) into battery. Here's one. This is a standard .308 sized charging handle that accommodates both the AR-10 and...

    Was: $19.19
    Now: $15.99
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    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...

    Was: $191.99
    Now: $159.99
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    AR10/AR15 Carbine Length Gas Tube

    AR10/AR15 Carbine Length Gas Tube

    Every gas-operated AR with a carbine-length system needs a gas tube of matching length. This is that gas tube. It's compatible with AR-15 and LR-308 / AR-10 sized rifles. See below for more info. Features: Stainless Steel Gas Tube for AR15 & AR10...

    Was: $14.39
    Now: $11.99
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    UTG® AR15 Ergonomic Pistol Grip

    UTG® AR15 Ergonomic Pistol Grip

    The UTG® AR15 Ergonomic Pistol Grip includes a non-slip texture, palm swell, and thumb rest for maximum comfort and stability. The grip angle offers easy accessibility to the trigger along with increasing shooting performance and accuracy...

    Was: $13.19
    Now: $10.99
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    D&H AR/M4 5.56/223 30rd Aluminum Magazine - Black D&H AR/M4 5.56/223 30rd Aluminum Magazine - Black 2 D&H AR/M4 5.56/223 30rd Aluminum Magazine - Black 3 D&H AR/M4 5.56/223 30rd Aluminum Magazine - Black 4

    D&H AR/M4 5.56/223 30rd Aluminum Magazine

    D&H brings you a classic look with new and improved features. Made from heat treated aircraft aluminum coated in Teflon, these rugged AR15 magazines are built to last and are protected from corrosion and are designed to hold both .223 and 5.56...

    Was: $11.99
    Now: $9.99
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    AR15 Pin & Detent Parts Kit

    AR15 Pin & Detent Parts Kit

    The KAK Industry AR15 Pin & Detent Parts Kit is made out of the best parts on the market. This kit is great for replacement parts, a new build, or having spare parts. This kit includes: a pivot pin takedown pin pivot and takedown detents hammer and...

    Was: $23.99
    Now: $19.99
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    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...

    Was: $263.99
    Now: $219.99
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    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...

    Was: $107.99
    Now: $89.99
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    AR-9 Bolt Carrier Group (Nitride) - 9mm

    AR-9 Bolt Carrier Group (Nitride) - 9mm

    You've meticulously picked out the parts needed for your new AR9 upper, and now you need  that final piece that is going to breathe some life into. Made in the USA, this AR9 Bolt Carrier Group is machined from 8620 Steel that ensures a high...

    Was: $137.99
    Now: $114.99
  • Sale
    CMMG 5.56 Muzzle Brake CMMG 5.56 Muzzle Brake CMMG 5.56 Muzzle Brake

    CMMG 5.56 Muzzle Brake

    If you're trying to get more control from your .223/5.56 rifle's barrel, it might be a good idea to swap out the A2 flash hider that probably came with your rifle with a compensator. A great option for you is the CMMG 5.56 Muzzle Brake. This particular...

    Was: $65.99
    Now: $54.99
  • 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...

    $29.99
  • 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
36 of 103 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 take-up and overtravel, 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.