Factory replacement RX Slide Assembly for the P229-1 9MM. Features: Optic ready with sight cover plate. X-RAY3 night-sights. Stylized relief cuts. Compatible with 229-1* frames and barrels. Optics Compatibility: ROMEO1PRO, Delta Point Pro, and RMR (requires RMR sealing plate). This slide does not void your P229 warranty. Please Note. This slide is intended for use with factory SIG SAUER 9MM threaded or non-threaded barrels, guide rods, and recoil springs. Compatible with ROMEO1PRO red dot sight. *229-1 pistols are the latest version of our P229. All P229s that shipped in a 40/357 configuration or a 9MM that has a rectangular barrel chamber when viewed from the top(vs trapezoidal) are 229-1 compatible. Most 229-1 9MM barrels are stamped "P229-1."