Description
Springfield Armory built the XD OSP Slide Assembly for owners who want red dot capability without buying a whole new pistol. Instead of shelving a perfectly good XD because it wasn't cut for an optic from the factory, this assembly gives you a direct path to modernizing the gun you already trust. It's finished in the same durable black steel Springfield uses on its factory slides, so it looks and feels like it belongs there, not like a bolted-on afterthought.
Swapping to the XD OSP Slide Assembly
The conversion is simpler than most people expect. Since this assembly is designed to work with your pistol's original barrel and recoil spring system, you're not sourcing extra parts or fitting a new barrel. The slide itself comes cut and ready, so the bulk of the work is a straightforward swap rather than a full build project. Suppressor-height sights come installed as well, which matters once you add a red dot since they let you keep a usable iron sight picture through the optic window.
Optics Compatibility on This XD OSP Slide
This assembly uses the Springfield Micro footprint, and it ships with the mounting plate along with cover plates for when you want to run it clean without an optic. That footprint lines up with a good number of popular micro red dots on the market, including options like the HEX Wasp, Shield RMS and RMSc, Leupold DeltaPoint and DeltaPoint Pro, SIG Romeo Zero, and the Crimson Trace CTS-1500, giving you room to pick whatever glass fits your budget and use case.
Fit is specific to the original full-size XD platform, covering both 4-inch and 5-inch models, so it's worth double-checking your exact XD variant before ordering. This isn't intended for the Mod.2, XD-M, XD-M Elite, XD-S, XD-S Mod.2, or XD-E lines, since those pistols use different slide geometry entirely.
Key Specifications
- Manufacturer: Springfield Armory
- Manufacturer Part Number: XD4901
- UPC: 706397962999
- Caliber: 9mm
- Barrel Length Compatibility: 4 inch
- Material: Steel
- Finish/Color: Black
- Optics Footprint: Springfield Micro
- Sights: Suppressor-height sights
- Compatible Pistols: Original full-size XD 4-inch and 5-inch models
- Not Compatible With: XD Mod.2, XD-M, XD-M Elite, XD-S, XD-S Mod.2, XD-E
- Shipping Weight: 0.9 lbs
What’s Included
- XD OSP-cut slide assembly (black steel)
- Springfield Micro footprint optics-mounting plate
- Cover plates for the optic cutout
- Suppressor-height front and rear sights
Frequently Asked Questions
Does the XD OSP Slide Assembly include a barrel?
No, this assembly is built to reuse your pistol's original barrel and recoil spring system, so those parts aren't included. If you'd rather get a barrel and recoil assembly bundled in, Springfield sells the XD OSP Slide Kit as a separate option that includes those components.
What red dots work with this slide assembly?
It uses the Springfield Micro footprint, which lines up with optics like the HEX Wasp, Shield RMS and RMSc, Leupold DeltaPoint and DeltaPoint Pro, SIG Romeo Zero, and the Crimson Trace CTS-1500. The mounting plate and cover plates are included, so you can install an optic now or keep it covered until you're ready.
Will this slide fit my XD Mod.2 or XD-M pistol?
No, this slide assembly is built specifically for the original full-size XD line in 4-inch and 5-inch configurations. It won't fit the Mod.2, XD-M, XD-M Elite, XD-S, XD-S Mod.2, or XD-E models since those use different slide dimensions.
Do the sights still work once I mount an optic on the XD OSP slide?
Yes, the assembly comes with suppressor-height sights specifically so they sit at the right elevation to co-witness through a mounted red dot. That gives you a backup iron sight picture without needing to swap sights separately.







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