NEW – FACTORY FN 509 MRD Midsize 9mm 4” Slide Assembly Non Optics Ready Lum Sights Black
$404.99NEW – FACTORY FN 509 Midsize 9mm 4” Slide Assembly Non Optics Ready Lum Sights Black Upgrade your setup with this genuine Factory OEM FN 509 MRD Midsize Complete Slide Assembly in black, chambered for 9mm with a 4” barrel. Designed for durability and reliability, this complete upper is ideal for replacement or build applications….
