AT3 TACTICAL AR ACADEMY
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The Ultimate Guide to AR-15 Lower Receivers
You can piece together your entire AR-15 from barrel to buttstock, but there’s one single part that you’ll need to make it fully complete and legally yours… Your AR-15 Lower Receiver. Sure you have to pass a background check to even get one, but there’s much more to picking the right Lower to complete your […]
How to Install Backup Iron Sights
AR-15 Optics are great, but when technology fails…you better have a backup plan. But fear not! Fasten your brain learning safety belts. It’s time for a crash course in AR15 backup iron sights, from installation to zeroing, let’s go! What is The Difference Between The Front Sight and Rear Sight Everyone has to start somewhere. […]
Mil-Spec vs. Commercial AR 15 Buffer Tubes – Which One is Better?
This is one of the most common questions we are asked, and for good reason. If you are interested in upgrading your AR-15 stock, or planning to build an AR, it is critical to understand the subtle differences between these two very similar standards.
Building an AR-15 or AR-10. What Parts Are Compatible?
Once upon a time, Eugene Stoner and the Armalite crew set out to create the AR-10, a rifle that could handle anything, even without a handy gunsmith nearby. They had a genius idea: make it fully modular! That meant you could mix and match parts in AR-10s and AR-15s… well, most of the time. Buckle […]
Ultimate Smith & Wesson M&P15 Upgrade Guide (2026 Update)
Ah, the AR-15 – a rifle so customizable, you’d think it was made out of Legos! The Smith & Wesson M&P15 may have a loyal fanbase, but let’s be real, there’s always room for upgrades. Like with most things, you start with the basic equipment, but the sweet gear you add makes you feel comfortable […]
AT3’s Guide to Smith & Wesson M&P15-22 Upgrades (2026 Update)
Have a plain Jane plinker you are lookin to trick out? This budget-friendly firearm closely resembles an AR-15 and can use its parts and accessories. With upgrades, we can transform the Smith & Wesson M&P15-22 into a remarkable masterpiece. Its .22LR caliber also makes it cheaper to shoot.