How to Build an AR-15 Upper

Use these step-by-step instructions to build a custom AR-15 upper! These instructions apply for all calibers.

LINKS:
- Grab an AR-15 build kit here: https://www.80-lower.com/ar-build-kits/
- Need the tools to build your upper? Grab 'em here: https://www.80-lower.com/gunsmithing-tools/
- Written instructions here: https://www.80-lower.com/80-lower-blog/how-to-build-an-ar-upper-instructions-photos/