Building a pistol-caliber AR can be an exciting and rewarding project for any firearm enthusiast. It offers a chance to tailor your gun to your specific preferences while enjoying the benefits of simpler blowback designs, manageable recoil, and more budget-friendly ammunition. By choosing the right parts and dedicating time to proper assembly, you can create a smooth, accurate, and reliable platform suitable for recreational range use or more serious purposes. One way to achieve this balance is by focusing on the ar-40 build kit or the ar-45 upper, both of which are designed to streamline you