
Palmetto State Armory

IWI

IWI

Great Lakes Firearms

FN America

Sig Sauer

Diamondback

Daniel Defense

Diamondback

Daniel Defense

Springfield Armory

Geissele

CMMG

Heckler & Koch

Smith & Wesson

Bravo Company

Palmetto State Armory

IWI

IWI

Great Lakes Firearms

FN America

Sig Sauer

Diamondback

Daniel Defense

Diamondback

Daniel Defense

Springfield Armory

Geissele

CMMG

Heckler & Koch

Smith & Wesson

Bravo Company
The complete rifle parts builders added most in October 2026, ranked from every build on GunPartPicker.
Updated · counts come from real builds on GunPartPicker
Prices checked · refreshed daily across 37 retailers