SPRINGFIELD ARMORY XD4901 XD SLIDE ASSEMBLY W/OSP PLATE Features: Includes an OSP-cut slide assembly for an XD 4-inch 9mm pistol along with a Springfield Micro footprint optics-mounting plate. It is designed to convert an XD 4-inch 9mm to an XD 4-inch 9mm OSP, while utilizing the original pistol's barrel and recoil spring system. With this assembly, you can easily swap out the slide on your 4-inch 9mm pistol to gain OSP optics-mounting capabilities
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