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If you're ready to jump into the world of AR-style rifle building, then it's critical to have the necessary tools that will make your next AR build a breeze. The Crosstac AR-15 Armorer Block Kit is a must-have for anyone who's looking to build more than a single rifle. Trust us, you'll build more than one AR after you're finished with your first.

Designed to work with both AR-15 and AR .308 platforms, this Crosstac Aluminum Armorer Block Kit includes features designed to secure both the upper and lower receivers of these popular platform. This design emerged from the frustration of Crosstac's team of engineers, who were tired of dealing with clamshell-style receiver holders. This adjustable block covers all platforms and will hold your receivers more securely than other armorer's blocks on the market.

Each Crosstac Armorer Block Kit features nylon setscrews that allow for precision adjustment inside the magazine well. This ensures a perfect fit, as each magazine well will have different profiles due to different construction methods. The block also features machined ledges in the base of the rest, so each block sits level. The block also includes the company's CNC-machined, stainless-steel pin driver.