The AR9 vs. AR-15: What's Different?

AR builders frequently ask: What's the difference between the AR9 and the AR-15 platforms? What parts are interchangeable, and which parts are unique to each? We're covering both platforms part by part, in detail.

LINKS:

- Build the AR9 in this video! https://www.80-lower.com/products/ar9-pistol-kit-7-5-parkerized-heavy-barrel-1-10-twist-6-5-mlok-handguard/

- Looking for a 9mm 80% lower? Grab one here: https://www.80-lower.com/9mm-ar9-80-lower/

- Read our in-depth AR9 build guide: https://www.80-lower.com/80-lower-blog/how-to-build-an-ar9-parts-guide-instructions/