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80 Lower Blog

How to Disassemble and Clean AR-15 Bolt Carrier Group

How to Disassemble and Clean AR-15 Bolt Carrier Group

Posted by 80-Lower.com on May 18th 2020

Use this easy-to-follow picture guide to diassemble and reassemble your AR-15's bolt carrier group. This guide applies to all commercial AR-15 and M16 or "mil-spec" BCGs, as well as the AR-10 or DPMS-patterned .308 bolt carrier group. We'll also cover spots to inspect and how to clean your bolt's …

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.


The Beginner's Guide to The AR-15: The Basics

The Beginner's Guide to The AR-15: The Basics

Posted by 80-Lower.com on May 1st 2020

We've got loads of information about building an AR-15. But if you're a first-time builder, all that info can feel overwhelming. This simple, shorter guide introduces the basics of the AR-15  and acts as a starting point for buying and building your first rifle. We'll gives you links to the …

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.


AR-15 Handguards Compared (M-LOK v. Keymod)

AR-15 Handguards Compared (M-LOK v. Keymod)

Posted by 80-Lower.com on Apr 28th 2020

One's a bunch of slats, one's a bunch of keyholes. Like the kind you'd find on those steel shelves in the garage. Which is better for all your accessories, optics, bipods, flashlights, and lasers? KeyMod or M-LOK? What are the differences? We're breaking down both. We need to give a shout-out t …

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.


The Guide to AR-15 Barrels and Twist Rates

The Guide to AR-15 Barrels and Twist Rates

Posted by 80-Lower.com on Apr 8th 2020

This guide covers all the important aspects of an AR-15 barrel from chamber to muzzle. We're covering the various types of manufacturing, the types of gun steel used to make barrels -- including clearing up all the nonsense about "mil-spec steel" -- and we're even going over barrel treatments and …

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.


How to Install an AR-15 Barrel & Gas System

How to Install an AR-15 Barrel & Gas System

Posted by 80-Lower.com on Mar 3rd 2020

Building an AR-15 upper piece by piece? Upgrading your barrel? Maybe you're swapping 5.56 or .223 for 300 Blackout like we are today. This guide illustrates how to install the AR-15 barrel and gas system. Total time required is approximately 30 minutes to one hour, and some basic tools are requir …

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.


The AR-10 vs. the LR-308: What's Different?

The AR-10 vs. the LR-308: What's Different?

Posted by 80-Lower.com on Feb 5th 2020

Building an AR chambered in .308 is wildly popular, especially with the introduction of ready-to-fire uppers,  80% lowers chambered in .308, and complete build kits. But the original AR-10 has few to no aftermarket components for sale, prohibiting a custom build. This is not a concern …

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.