Sig Sauer 8901572 P320 Slide Assembly 9mm Black Stainless Steel Optic Ready Slide 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 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. Model: P320 Material: Stainless Steel