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80 Lower Blog

AR-15 Barrel Lengths and Twist Rates by Caliber

AR-15 Barrel Lengths and Twist Rates by Caliber

Posted by 80-Lower.com on Jun 9th 2021

Barrel length and twist rate can make or break your custom AR build. A barrel that's too short won't provide good velocity and accuracy will suffer. A bad twist rate's even worse: With the right barrel it won't matter, your rounds will over-stabilize or fail to stabilize at all, resulting in bu …

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.


9mm vs .45 ACP

9mm vs .45 ACP

Posted by 80-Lower.com on May 21st 2021

It's an age-old argument: 9mm vs .45 ACP. Which one is better? Is there a "better" cartridge between the two, universally speaking? There's less than one-tenth of an inch of difference (0.095", to be exact) between the two bullets' diameters. Lovers of .45 ACP say there are few other roun …

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.


300 Blackout vs 9mm Parabellum

300 Blackout vs 9mm Parabellum

Posted by 80-Lower.com on Apr 29th 2021

The AR-15 is equally capable of chambering 300 Blackout and 9mm Parabellum. Both cartridges can function as supersonic and subsonic loads with short barrels. Both can be effectively suppressed when loaded as subs. Both provide similar AR configurations to accomplish this. So, 300 BLK is a pretty …

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 Fundamentals of Marksmanship

The Fundamentals of Marksmanship

Posted by 80-Lower.com on Apr 27th 2021

We talk a lot about building ARs from scratch. But what good does that new rifle or pistol do you, if you can't effectively send those rounds downrange? If you're a new shooter or builder, chambering that first cartridge and pulling the trigger can be intimidating. It's not embarrassing to admit …

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 Best AR-15 Calibers By Purpose

The Best AR-15 Calibers By Purpose

Posted by 80-Lower.com on Apr 1st 2021

Which AR round should you pick for home defense? For competition? For hunting and general purpose? There are loads of cartridges that now fit in the average black rifle. Picking the right one for your needs is critical. While 5.56 NATO and .223 Remington are great "do-it-all" cartridges, new loads l …

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 Best AR-15 Upgrades

The Best AR-15 Upgrades

Posted by 80-Lower.com on Mar 11th 2021

You just finished putting together your first AR-15. Or, maybe you simply bought a "retail" rifle that came fully assembled. Either way, it's probably a good shooter. Good, but not perfect. The AR-15 platform's been developed for decades and it remains one of the most popular rifles sold in Am …

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.