AT3 TACTICAL AR ACADEMY

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Mid Length vs Rifle Length vs Carbine Length Gas System [2025 Update]


Are you planning on buying or building an AR-15? Or changing out parts such as barrels, gas blocks, or handguards? If so, it’s important to understand how the gas system on an AR-15 works, why it’s so important, and how the length of your gas system can affect the performance of your rifle.
co-witness

Absolute Vs Lower 1/3 Co-witness Sights -The Ultimate Guide [2025 Update]


Co-witness refers to the alignment of your iron sights with your optics. If your irons and your optics are both sighted in, you would expect them to be aligned (co-witnessed) with each other when you line up your shot. Learn more about the different varieties of cowitness that you can use.

Red Dot Sight

Where Should I Mount My Red Dot Sight on My AR-15? [2025 Update]


Pssst! Let us include you in on a secret: There is in fact an optimal spot to mount a red dot sight on your AR-15. A good hint is to steer clear of that fancy freefloat handguard’s rail. Stick with us and follow along below because we will cover all of the bases and keep […]

What’s the Best AR-15 Barrel Brand?


Author: John McCoy Building ARs is great. It is Legos for grown-ups. It allows you to take what is arguably one of the top weapon systems in the world and make it anything you want. Do you want a clone of the classic A2 you carried in the Army? No problem. Want a long-range dedicated […]

How to Build a Home Defense AR-15


Author: Billy M. A smash of glass. A crash in the night.  It’s happened.  Your home has been invaded. There’s little that’s scarier than the possibility of a fast and furious, close-quarters self-defense scenario, especially one where your home and family might be on the line. One of the best tools to have by your […]

How to Install an AR-15 Free Float Handguard


Author: John McCoy The furniture on your AR-15 says a lot about you. It is a part that defines the shooter. Perhaps you are a traditionalist and opt for a standard M4-style MIL-SPEC drop-in handguard. Or you like the sleek and infinitely modifiable appearance and function of a free-floating handguard. On the other hand, maybe […]