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  • Aero Precision Gamma 7.62 Muzzle Brake Aero Precision Gamma 7.62 Muzzle Brake Aero Precision Gamma 7.62 Muzzle Brake

    Aero Precision Gamma 7.62 Muzzle Brake

    If being quick with follow-up shots from your LR-308 counts, you'll want either a muzzle brake to control recoil or a compensator to reduce muzzle rise. The good people at Aero Precision want you to have both, in one single device. This is the Gamma 7.62...

    $76.49
  • 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...

    $54.99

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

Welcome to the parts counter. Ready to build a truly custom AR-15 from scratch? It's all here: Upper parts, lower parts, rail attachments, grips, handguards -- you name it, we've got it.

Need help picking parts? Start with our Builder's Master Guide

AR Lower Parts: What's in a Receiver?

We've sourced quality, mil-spec lower receiver internals and components so you can complete your AR-15 build with confidence backed by guaranteed compatibility. The AR lower parts assembly includes the following:

  • Stripped lower receiver, or fabricated 80% Lower
  • Lower parts kit
  • Buffer tube
  • Buffer and recoil spring
  • Pistol grip
  • Castle nut
  • Latch plate

Grips, castle nuts, and latch plates are typically included in the lower parts kit. An upgraded latch plate (like this Magpul ASAP QD plate) includes a QD sling stud mount for easy carrying. An upgraded drop-in or "cassette" trigger (like this JMT Single Stage) provides a better trigger pull with less weight and faster, smoother resets for improved accuracy.

Ready to assemble? Here's how to install your lower parts kit.

Not sure what parts you need? Check out our full lower assemblies!

AR Upper Parts: Everything You Need

Your finished AR upper is the "business end" of your rifle or pistol: It's responsible for chambering and firing live rounds. So, you're going to want the highest-quality parts for reliability and accuracy. That means investing in a 4150 CMV barrel, an M16-type bolt carrier group, and a forged M4-type upper receiver. We've got all those components available at great prices.

Want to make it even easier? We've got tons of barreled upper assemblies, pre-built with a bolt included, ready for install. Options are available for .308, 6.5 Creedmoor, .223 Wylde, 300 Blackout, and 9mm, and of course, 5.56 NATO.

Here's how to install the AR-15's barrel, gas system, and handguard.

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.

 


DISCLAIMER: “GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither 80% Lowers, a/k/a Tactical Gear Heads, LLC nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.

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.