Building your own AR-15 remains one of the most popular DIY firearm projects in the United States. Whether you're seeking full customization, better value than a complete rifle, or the satisfaction of hands-on assembly, a home-built AR-15 offers excellent performance and flexibility. This comprehensive guide covers everything for a successful, legal DIY AR-15 build—from parts selection to final assembly and safety tips. Important Disclaimer: Firearm laws change. Building an AR-15 for perso …