The place to get started:Everything about the “AR9”
Having a specific problem:9mm AR Troubleshooting Guide
Very popular:What 9mm buffer do I need??? (and spring)

Welcome to the online encyclopedia of 9mm AR information! It has taken me several years to put this all together. Here you can find what works, what doesn’t, and what never did. Building a 9mm AR to run 100% is easy if you can avoid all the popular misinformation and nonsense.

This site is not sponsored, and does not generate any income. None of my links are sponsored or generate revenue. I receive no income from social media posts or any other source related to the information on this site.


All information found on this site is intended solely for entertainment purposes only. Do not perform any action based on any of the information found on any page of this site. The accuracy of this information is not guaranteed or warranted.