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  • Muzzle Brake for AR Rifles by Midwest Industries

    Muzzle Brake for AR Rifles by Midwest Industries

    If managing recoil for your AR is your main concern, you'll want a muzzle brake that mitigates it as much as possible. The Midwest Industries Muzzle Brake does. Throw compensation and hiding your flash to the wind, and get as much recoil reduction as...

    $39.99
  • 5/8 x 24 RH FATman Hex Brake by Phase 5 Weapon Systems 5/8 x 24 RH FATman Hex Brake by Phase 5 Weapon Systems

    5/8 x 24 RH FATman Hex Brake by Phase 5 Weapon Systems

    If you're a person who does a lot of high-performance shooting, then you want to lessen the recoil as much as possible while still maintaining a level barrel for optimal accuracy. The people at Phase 5 Weapon Systems are well aware of this. That's why...

    $144.99
  • Sale
    5.56 Muzzle Brake by CMMG 5.56 Muzzle Brake by CMMG 5.56 Muzzle Brake by CMMG

    CMMG Muzzle Brake - 5.56

    If you're trying to get better control from your .223/5.56 rifle's barrel, it may 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
  • Delta 556 Muzzle Brake by Aero Precision Delta 556 Muzzle Brake by Aero Precision Delta 556 Muzzle Brake by Aero Precision

    Delta 556 Muzzle Brake by Aero Precision

    On the spectrum from low recoil to less muzzle rise to less concussive blast and flash, you've decided your AR's recoil doesn't need to be lessened. Consequently, you've decided to take the edge off the explosion you hear each time you send a round...

    $54.99
  • MIAD Mission Adaptable Grip by Magpul MIAD Mission Adaptable Grip by Magpul

    Magpul Adaptable Grip - MIAD Mission

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

    $34.99
  • UTG PRO Ambidextrous Grip by Leapers, Inc. - UTG UTG PRO Ambidextrous Grip by Leapers, Inc. - UTG UTG PRO Ambidextrous Grip by Leapers, Inc. - UTG UTG PRO Ambidextrous Grip by Leapers, Inc. - UTG

    UTG PRO Ambidextrous Grip by Leapers, Inc.

    You deserve more out of an AR-15's grip than the standard A2 grip. This is the UTG PRO Ambidextrous Grip by Leapers Inc. UTG. Aside from polymer construction, it's been given excellent ergonomics to reduce fatigue, and so you can get a purchase between...

    $14.99
  • MagLink® Coupler – PMAG® 30/40 AR/M4 by Magpul

    Magpul MagLink® Coupler – PMAG® 30/40 AR/M4

    The Magpul MagLink Coupler is a two-piece non flex design, made from reinforced polymer lightweight material engineered for easy accessibility. The MagLink Coupler allows the shooter to carry additional ammunition on the weapon by attaching two magazines...

    $17.95
  • MOE-K2® Grip – AR15/M4 by Magpul MOE-K2® Grip – AR15/M4 by Magpul-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, the shooter's hand is naturally positioned closer to the body which allows for proper...

    $20.95
  • MOE+® Grip – AR15/M4 by Magpul

    MOE+® Grip – AR15/M4 by Magpul

    The Magpul MOE+ Grip has a reinforced rubber mold wrapping around the polymer body, allowing for maximal comfort and weapon control. This durable material prevents snags and damage, allowing this product to be dependable in rugged environments. The MOE+...

    $23.95
  • AFG-2® - Angled Fore Grip by Magpul

    AFG-2® - Angled Fore Grip by Magpul

    The Magpul Angled Fore Grip (AFG-2) has a slim design due to the fact that this fore grip has a shorter length and width compared to Magpul's previous model, the AFG. There is more control and less recoil using this fore grip since the shooter's hand is...

    $34.95
  • XTM® Enhanced Rail Panel by Magpul

    Magpul XTM® Enhanced Rail Panel

    You mounted all your add-ons the pic rails of your handguard and got her set up exactly how you want her. Everything feels good, except the still-exposed sections of rail on your handguard. If and when they dig into your hand, they're a distration...

    $7.95
  • Magpul Angled Foregrip - Black - M-lok

    Magpul Angled Foregrip - Black - M-lok

    MagPul continues their reign of tradition, excellent quality, and innovation with this M-Lok Angled Foregrip. This triangle grip is perfect for large or small hands, with its new and improved sleek design. Aiding in muzzle control, this AR-15 foregrip is...

    $44.99
  • 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

    We don't want to say this is the kit to end all kits, because that would be too cliché. So we'll just tell you this is the kit to end the lower half of your AR build. If you got your hands on a stripped lower and you're ready to build, this kit...

    $119.99
  • Sale
    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 on going the standard (and the easiest) route with the muzzle end of your .223 or 5.56mm chambered AR by installing a muzzle device, you'll need a crush washer. This is the one you need. You just slide it onto the threading of your barrel,...

    Was: $1.91
    Now: $1.59
  • Magpul 5-Slot MOE® Polymer Rail

    Magpul 5-Slot MOE® Polymer Rail

    M-Lok handguards have seriously upgraded the way we mount our add-ons onto our ARs. But if you have an accessory that's not M-Lok compatible and still uses the 1913/pic rail system, you need some rails. Well we got the rails. This is a five-slot section...

    $5.95
  • Sale
    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 major hassle. If you're starting with just individual parts, you need to snap the C-clamp onto the rod without launching the damned thing across the room and never seeing it again. Then you...

    Was: $11.99
    Now: $9.99
  • AR15 Enhanced Carbine Buffer Kit by Aero Precision AR15 Enhanced Carbine Buffer Kit by Aero Precision AR15 Enhanced Carbine Buffer Kit by Aero Precision

    AR15 Enhanced Carbine Buffer Kit by Aero Precision

    You already know 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 great if...

    $54.99
  • AR-308 Lower Parts Kit - Spike's Tactical

    Spike's Tactical - AR-308 Lower Parts Kit

    The Spike's Tactical AR-308 Lower Parts Kit has a great fit and finish along with a military grade design that is built to last. This parts kit is meant to be used with Spike's Tactical's forged sets and may not be compatible with any other large frame...

    $79.99
  • 15-m-lok-free-floating-handguard-1 15-m-lok-free-floating-handguard-2 15-m-lok-free-floating-handguard-3 15-m-lok-free-floating-handguard-4 15-m-lok-free-floating-handguard-5

    15" M-Lok Free-Floating Handguard

    Need some "front end" to finish off that AR build of yours? How 'bout 15 inches of it? Put the finishing touches on your standard-sized AR-15 with this handguard. You get enough rail space on top to mount your backup sights or even optics. The M-Lok...

    $59.99
  • 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, causing the stock to collapse down. The detachable rubber butt-pad prevents slippage when pressed against the shoulder along with...

    $59.95
  • Sale
    MOE® AR15/M4 Grip by Magpul

    MOE® AR15/M4 Grip by Magpul®

    Look, the AR-15 for how modular it is and how it can adapt to any situation, falls short in one key area: the grip is bad. Like real bad. There's no such thing as holding it right and being comfortable at the same time. The angle is horrible. The way an...

    Was: $22.79
    Now: $18.99
  • ARH300 - Folding Stock Adapter by Sylvan Arms ARH300 - Folding Stock Adapter by Sylvan Arms ARH300 - Folding Stock Adapter by Sylvan Arms ARH300 - Folding Stock Adapter by Sylvan Arms ARH300 - Folding Stock Adapter by Sylvan Arms

    Sylvan Arms Folding Stock Adapter (ARH300)

    Set up your AR-15 to make it more easily stowable when you carry with you to the range. No more carrying around huge bulky rifle bags and cases. Make your rifle short enough to fit into something smaller. Shorten it for travel with the AR-15 and AR-9...

    $209.99
  • Sale
    10-m-lok-free-floating-handguard-1 10-m-lok-free-floating-handguard-2 10-m-lok-free-floating-handguard-3 10-m-lok-free-floating-handguard-4 10-m-lok-free-floating-handguard-5

    10" M-Lok Free-Floating Handguard

    Need some "front end" to finish off that AR build of yours? How 'bout 10 inches of it? Put the finishing touches on your standard-sized AR-15 with this handguard. You get enough rail space on top to mount your backup sights or even optics. The M-Lok...

    Was: $83.99
    Now: $69.99
  • Magpul® AR15 Furniture Kit - MOE®, Carbine-Length Magpul® AR15 Furniture Kit - MOE®, Carbine-Length 2 Magpul® AR15 Furniture Kit - MOE®, Carbine-Length 3 Magpul® AR15 Furniture Kit - MOE®, Carbine-Length 4 Magpul® AR15 Furniture Kit - MOE®, Carbine-Length 5

    Magpul® AR-15 Furniture Kit - MOE®, Carbine-Length

    If you specifically have an M4-style or a CAR-15-style AR-15 with all stock parts including the carbine-length gas system, and you want some upgrades, then this is for you. You can get several comfort and quality-of-life upgrades all in one place with...

    $85.35
  • Lower Parts Kit for .223/5.56 by Spike's Tactical

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

    The mil-spec lower parts kit is adequate. It does the job it was designed for. 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. As with the...

    $89.99
  • R2 5.56 Muzzle Brake by Spike's Tactical R2 5.56 Muzzle Brake by Spike's Tactical R2 5.56 Muzzle Brake by Spike's Tactical

    R2 5.56 Muzzle Brake by Spike's Tactical

    Spike's Tactical understands the need to reduce felt recoil for your AR-15. Sure the AR might not kick a lot to begin with, but for you that have AR pistols and builds with generally shorter barrels, the R2 from Spike's Tactical will perform extremely...

    $74.99
  • Magpul M-LOK® QD Sling Mount Magpul M-LOK® QD Sling Mount 2 Magpul M-LOK® QD Sling Mount 3 Magpul M-LOK® QD Sling Mount 4 Magpul M-LOK® QD Sling Mount 5

    Magpul M-LOK® QD Sling Mount

    The Magpul M-LOK QD Sling Mount is manufactured from a durable Mil-Spec anodized aluminum, that is a lightweight anti-swivel design offering beveled edges to prevent snagging and rotation. The M-LOK QD Sling Mount provides a forward attachment point...

    $19.95
  • Magpul RSA® QD - Rail Sling Attachment QD Magpul RSA® QD - Rail Sling Attachment QD 2 Magpul RSA® QD - Rail Sling Attachment QD 3 Magpul RSA® QD - Rail Sling Attachment QD 4 Magpul RSA® QD - Rail Sling Attachment QD 5

    Magpul RSA® QD - Rail Sling Attachment QD

    The Magpul RSA QD is a slim two point sling design, angled at a position for optimal comfort and easy access to the push-button. The RSA QD provides a forward attachment point compatible with push-button QD slings and the Magpul MS4 sling...

    $29.95
  • 5-Slot M-LOK® Aluminum Rail by Magpul

    Magpul 5-Slot M-LOK® Aluminum Rail

    You took all the time to pick out your favorite M-Lok handguard for your new AR build, but the problem is that the vertical grip, light mount or laser mount you have in mind to use on your handguard is made to attach to a 1913 / pic rail like that of an...

    $19.95
  • RA-535 Advanced Performance Drop-In Trigger RA-535 Advanced Performance Drop-In Trigger RA-535 Advanced Performance Drop-In Trigger

    RA-535 Advanced Performance Drop-In Trigger

    Your search for the ultimate AR trigger means discovering a quality unit that eliminates the worst traits found on some triggers. You'll want to minimize take-up - that loose, dangly feeling you notice before putting pressure on your trigger...

    MSRP: $319.00
    $209.99

Quality, American-made AR-15 parts for customizing your rifle or pistol.

Part of the fun of owning an AR-15 is the ability to easily customize it. Whether it's adding a new foregrip or trigger, replacing your bulky handguard with a lightweight unit, slappin' on a sling, or replacing that basic A2 flash hider with a proper compensator or flash hider, we've got you covered with quality, US-made components.

 

New to building ARs? Check out our complete "how-to" and parts guide!

Mil-Spec and Upgraded LPKs

The most important part of assembling your AR-15 is the installation of the lower parts kit. That's why we've carefully selected a quality catalogue of LPKs that satisfy mil-spec fitment - allowing them to work with all our available 80% lowers - and upgraded lower parts with enhanced grips and custom, high-performance coatings that improve trigger feel and function.

Complete Lower Build Kits

Got a barreled upper assembly that you're ready to put to work? We have the critical other half your custom AR build available in our complete lower build kits. These units ship with parts kits, a buffer assembly and stock or brace (for rifles and pistols) and an 80% lower that you get to fabricate to make a truly custom, from-scratch stripped lower receiver.

AR Stocks and Pistol Braces

Getting a good cheek weld and having a lil' extra comfort behind the gun can help make shooting your AR rifle or pistol even better. We've sourced some of the most popular AR stock and brace options for any setup, all available at a great price. Need a conventional six-position buttstock? Grab an O.G. M4-type stock for only $10! Need to outfit your lower receiver with a full buffer assembly, too? Check out our available stock an brace kits.

Upgraded Pistol Grips

Let's face it: The AR's stock pistol grip gets the job done, but it's outdated. New grips with better angles and materials can make a world of difference in how you maneuver and aim with your black rifle. We've got some of the most popular options from Magpul and UTG, with over-molded grips also available for large hands and better comfort. Check 'em out here.

AR Slings and Sling Mounts

Most new AR builders are so excited to part together their new rifle or pistol, they forget one of the most important accessories: A proper sling. We've got comfortable, battle-ready options from Magpul and others, with easy-to-install sling mounts and plates that make hanging your AR off your sling - and getting it into the high-ready position - natural and smooth.

Other AR-15 Accessories

 Looking for that one way to improve your AR like nobody else? That one accessory that makes your rifle or pistol shoot better, provide easier control, or simply more mag access? Check out our AR accessories. We've got some one-off upgrades like 9mm conversion blocks, double mag holders, the infamous B.A.D. lever for quicker mag swaps, and quality rifle cases.


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 GunBuilders.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.