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80 Lower Blog

How to Legally Convert an AR Pistol Into an SBR

How to Legally Convert an AR Pistol Into an SBR

Posted by 80-Lower.com on Oct 27th 2022

The ATF wants to ban pistol braces. The agency published a list of "criteria" for determining whether your AR-15 pistol, when equipped with a brace, will instead be considered an illegal short-barreled rifle. If you want to keep enjoying your AR pistol with any accessories you want, 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.


E-Filing ATF Form 1 to Build an SBR: Intro & Registration

E-Filing ATF Form 1 to Build an SBR: Intro & Registration

Posted by 80-Lower.com on Oct 27th 2022

How to File Form 1 Paperwork for an SBR You want to build an SBR (short-barreled rifle). Maybe you're  converting an AR pistol into one to avoid the pistol brace ban. This will serve as your step-by-step guide for filling out and submitting the ATF's Form 5320.1 paperwork using their EForms …

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 Oct 17th 2022

This guide covers all the important aspects of the AR-15 barrel: Rifling, forging, and barrel steel, treatments and coatings, and the best barrel lengths and twist rates for the most popular cartridges. Here's how to install the AR-15 barrel and gas system. AR-15 Barrel Types There are thre …

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.


What is an 80% lower?

What is an 80% lower?

Posted by 80-Lower.com on Sep 6th 2022

Building an AR-15 (or any firearm) is an exciting project that new and experienced shooters can take on. If you're looking into building an AR-type rifle or pistol from scratch, you've probably heard of the 80% lower receiver. This unfinished firearm part is the key to fabricating a custom AR or …

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.


Muzzle Brakes vs. Flash Hiders vs. Compensators

Muzzle Brakes vs. Flash Hiders vs. Compensators

Posted by 80-Lower.com on Sep 2nd 2022

Muzzle devices! There are lots of 'em. You've got muzzle brakes, and flash hiders, and compensators, and suppressor. What's the difference between all of these? What's a pinned and welded flash hider? Which device should I get? Let's answer all the questions and compare muzzle brakes vs. flash …

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 P320 Grip & Size Guide

The P320 Grip & Size Guide

Posted by 80-Lower.com on Sep 2nd 2022

If you've read our P320 Build Guide, then you're probably wondering how to easily convert your newly built Sig Sauer pistol between its various sizes, barrel lengths, and calibers. That's accomplished by swapping the P320's fire control unit -- the part legally considered the firearm itself -- in …

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.