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80 Lower Blog

AR-15 Barrel Lengths and Twist Rates by Caliber

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

AR-15 Barrel Lengths and Twist Rates by Caliber
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 … read more

Stealth Arms 1911 Jig: Tools Required

Posted by 80-Lower.com on May 26th 2021

Stealth Arms 1911 Jig: Tools Required
Looking for jig instructions? Click here for the how-to guide. Completing your 80% 1911 frame is incredibly easy. In fact, it's probably easier than fabricating an 80% lower for an AR-1 … read more

9mm vs .45 ACP

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

9mm vs .45 ACP
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 (0.0 … read more

300 Blackout vs 9mm Parabellum

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

300 Blackout vs 9mm Parabellum
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 … read more

What, Exactly, is an FFL?

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

What, Exactly, is an FFL?
As a purveyor of 80% receivers, we get a lot of questions about FFLs: Federal Firearm Licenses (or Licensees) and what, exactly, they are and are not. So we're clearing it up with this simple, st … read more

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