Build Parts

Build, upgrade, or customize your AR-style firearm with AR build parts and components from 2nd Amendment Armory. We carry a selection of parts for AR-15, AR-10, and other compatible AR-style platforms, whether you’re starting a new build or upgrading an existing firearm.

Browse upper and lower parts, barrels, handguards, bolt carrier groups, charging handles, triggers, gas blocks, gas tubes, buffer systems, stocks, grips, muzzle devices, small parts, and other AR components from trusted manufacturers. From individual replacement parts to components for a complete custom build, our selection gives you options to configure your AR around your needs and preferences.

Shop AR build parts online or visit 2nd Amendment Armory in Brandon, Florida for help finding compatible components for your AR-style firearm.