80 Lower Blog - Page 8

How to Build an AR Upper: Instructions & Photos

Posted by 80-Lower.com on Feb 13th 2024

Ready to assemble a barreled AR-15 upper receiver? Follow these instructions. We're assembling a 300 Blackout upper, but these instructions are identical for all standard AR-15 (5.56/.223), AR-10 (.308) and AR9 (9mm) uppers. Note that 9mm uppers do not need a gas system, so skip those steps. 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 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.

AR-15 Pistol vs. SBR: What's The Difference?

Posted by 80-Lower.com on Jan 30th 2024

In the past years, AR-15 pistols have become increasingly popular. The reason why is simple: Buying or building a short-barreled rifle (SBR), is far costlier and requires extensive paperwork. But what, exactly, is an SBR? What's an AR pistol, and why choose one or the other? Let's compare.What is a …

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.

FAQ's Regarding the August 8 Supreme Court Ruling on the Frame and Receiver Rule

Posted by 80-lower.com on Aug 10th 2023

Updated March 27, 2025 What Did The ATF Do? On August 24, 2022, the ATF's Final Rule ( 2021R-05F), went into effect. This rule attempts to restrict the manufacturing, sale, and ownership of unfinished 80% lowers, 80% frames. Under this rule, 80-Lower.com and other, similar businesses are restricted …

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.

How to Clean The AR-15 BCG

Posted by 80-Lower.com on Jun 27th 2023

Your AR-15's bolt carrier group (BCG) cycles ammunition at a high rate of fire. It extracts, ejects, and chambers new rounds with every pull of the trigger. But to do all this, the BCG gets dirty. Very dirty. The AR's downfall is its "direct impingement" gas system, which launches carbon, ga …

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.

How to Build an AR-10: The Complete Guide

Posted by 80-Lower.com on Jun 26th 2023

We've covered how to build an AR-15, but many shooters want a rifle with a larger caliber. While the AR-15 can chamber some larger cartridges -- like 6.5 Grendel and 300 Blackout -- the AR-10 platform is what you need to load rounds like .308 Winchester and 6.5 Creedmoor.Picking Your AR-10 Platfo …

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.

The Ultimate Gun Safe Guide, Part 3: Best Rifle Safes

Posted by 80-Lower.com on Jun 16th 2023

In Part One of our Ultimate Gun Safe Guide, we covered all the info you need to know about safes, like locks, fire ratings, safety features, and the steel used to build safes. Part Two covered bedside and portable pistol safes. Now we're looking at conventional gun safes for rifles: Those big …

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.