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Mil-Spec vs Commercial Buffer Tube: The Difference Explained

80 Percent Arms | Feb 18th 2021

What Are AR-15 Buffer Tubes? Rifle buffer tubes are officially known as receiver extensions because there is a large spring inside the tube known as the buffer spring. The recoil buffer is the we...

Are 80% Lowers Legal?

80 Percent Arms | Sep 28th 2020

*Updated 10/24/2022Legal Disclaimer: We are not lawyers. This information is not intended to be legal advice. Please do your own research, consult a lawyer, and do not rely on the above information.If...

AR15 vs M16 vs M4: What’s the Difference?

80 Percent Arms | Mar 18th 2020

Besides the civilian and military designations what’s the real difference between the M16 and the AR15? Why separate names for something that is so similar, and which ones can we and can’t we own a...

7075-T6 vs 6061-T6 Aluminum Billet 80% Lowers

80 Percent Arms | Mar 2nd 2020

When looking at 7075 vs 6061, it’s important to first understand what those numbers represent. Both contain elements such as magnesium, silicon, copper, iron, zine, the 6065 contains less zinc. The...

AR Pistol vs. SBR - What’s the Difference?

80 Percent Arms | Jan 14th 2020

With short barrel AR platforms being all the rage these days, more and more people are looking into the legality between and SBR vs AR Pistol. And why not? With modern ammunition, short 10.5" barrels...

AR9 vs. AR15 - What’s the Difference?

80 Percent Arms | Dec 27th 2019

In simple terms, the terms ‘AR’9 and ‘AR15’ refer to AR style rifles chambered in 9mm Luger and .223/.556, respectively. The two rifles were designed for two very different purposes, so their diffe...

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Mil-Spec vs Commercial Buffer Tube: The Difference Explained

Are 80% Lowers Legal?

AR15 vs M16 vs M4: What’s the Difference?

7075-T6 vs 6061-T6 Aluminum Billet 80% Lowers

AR Pistol vs. SBR - What’s the Difference?

AR9 vs. AR15 - What’s the Difference?

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