This P320-XFIVE complete 5" slide offers the ultimate in competitive firearm slides. Featuring a 5" match-grade barrel, and stainless steel slide construction for incredible accuracy and durability. It comes standard with a fiber optic front sight and adjustable rear sight which may be replaced with our PRO footprint optics such as the ROMEO2 or ROMEO-X PRO. The recoil system uses a solid steel guide rod and a 14lb 1911-style spring, with an additional 12lb spring. Sig Sauer P320 XFIVE 9mm 5" Black Slide Barrel Assembly w/Fiber Optics Front & R2 Adj. Rear Sights 8901572