
Bravo Company

Geissele Automatics

Daniel Defense

Yankee Hill Machine

Spike's Tactical

CMMG

Daniel Defense

Battle Arms Development

Radical Firearms

TacFire

Daniel Defense

TacFire

FightLite Industries

Palmetto State Armory

Yankee Hill Machine

Spike's Tactical

Bravo Company

Geissele Automatics

Daniel Defense

Yankee Hill Machine

Spike's Tactical

CMMG

Daniel Defense

Battle Arms Development

Radical Firearms

TacFire

Daniel Defense

TacFire

FightLite Industries

Palmetto State Armory

Yankee Hill Machine

Spike's Tactical
The upper receiver parts builders added most in August 2026, ranked from every build on GunPartPicker.
Updated · counts come from real builds on GunPartPicker
We analysed real builds to see what people actually run.
Read the full guide: Most Popular AR-15 Upper Receivers →Prices checked · refreshed daily across 31 retailers