FN 66-101950 510 Tactical 10mm 10+1 4.71″ Black Steel Threaded Barrel, Gray PVD Optic Cut/Serrated Stainless Steel Slide & Polymer Frame w/Picatinny Rail, Interchangeable Backstrap Grip

Includes two (2) interchangeable backstraps (small and medium), Includes (2) 10-round magazines. Stainless-steel slide with patented FN Low-Profile Optics-Mounting System; includes guarded slide cap that protects the rear sights, adapters and screws for the direct-mounting of most major optics footprints