This is a replacement locking block for Shadow Systems MR, DR and XR series pistols. The locking block sits in the frame and works with the barrel during lockup and unlocking, so replacing a worn one keeps the pistol running correctly. An original Shadow Systems part.
- Brand: Shadow Systems
- Type: Locking block
- Fits: Shadow Systems MR, DR, XR series
- Manufacturer part number: SG9C0124
- UPC: 810120312859
