Welcome To The AT3 Knowledge Center!

Get your air-sickness bags ready, Boys. You’re about to plug into the Information MATRIX we like to call The AT3 Knowledge Center … for all things AR-15, AR-10, AR-9 & all AR-style firearms! It’s like Mag Dumping 1,000rds of Pure, American, Unadulterated, 2econd Amendment Info on Your Brain! It’s the AT3 Knowledge Center… Information is what we do best!


Mountain Billy Gun Lab GOAT-15 22LR 16″ Rifle
(June 18 – July 15)

We will be selecting one lucky winner that gets a brand new GOAT-15 22LR Rifle worth $450!

Featured Videos

MilSpec vs. Radian Raptor SD-SL vs. Breek Arms Sledgehammer … Today we’re testing “Do AR-15 and AR-Style Charging Handles reduce gas”, as well as they claim to do?! ***Add your thoughts below*** We’re just getting started. SO many charging handles, SO many visual clues! This is going to be a wild ride!

Step-By-Step Guide to AR Rifle Building

AT3 GeAR Grind

Ultimate AR-10 Builder’s Guide:

Today’s AR-10 is NOTHING like today’s AR-15. It’s NOT universal or “MilSpec”. So, what parts do you actually need to build an AR-10? What actually fits together? DPMS / SR25  Aero Precision M5…Or your off-the-shelf AR-10s like the Sig Sauer 716i? A 5-Part Mini Series walking you through building your AR-10 from scratch. All the parts, where they fit… and MORE!

The Ultimate AR-15 Guide

Over 20 episodes covering the basics of the AR-15 shooting world. From Barrels to Buttstocks, the AR15 world is full of options, variants, modifications and adjustments.

Ultimate AR-15 Guide

17 Videos

All AT3 Tactical Videos!