The SIG Sauer P320 X‑Series 3.9″ Slide Assembly — Coyote is a factory OEM replacement/upgrade slide built from stainless steel and finished in Coyote Brown. Designed to accept SIG’s 3.9″ 9mm barrel, the slide ships with suppressor‑height XRAY3 day/night sights and a removable SIG‑LOC optics plate for straightforward mounting of popular micro red‑dot footprints (ROMEO/RMR/DeltaPoint Pro families). Built to fit Carry and Compact grip modules (X‑Series and non‑X where noted), this optics‑ready slide provides factory fit, finish, and features without aftermarket machining — sold as a slide assembly (barrel and recoil components usually not included), it’s an ideal drop‑in option to build or refresh an optics‑capable P320 in a coyote finish.