The SIG Sauer P320 M17 4.7″ Slide Assembly is a factory‑built M17 slide finished in coyote PVD and equipped with SIG’s rugged ROMEO‑M17 reflex sight and SIGLITE front/rear sights — ideal for swapping onto a compatible P320 fire control unit to create an M17‑style pistol. Built from stainless steel with the M17/MHS SIG‑LOC footprint and including a loaded‑chamber indicator, this assembly is optimized for 9mm (and compatible 9mm/.357 SIG/.40S&W FCUs). Note that many retailers list the slide sold without barrel or recoil assembly, so confirm included parts before purchase. The result is a turnkey, optics‑ready military‑style slide assembly for users who want factory integration of the ROMEO‑M17 sight and the M17 aesthetic/performance.