This replacement part is displayed as part number 400 on RM4A1/CQB/T6/QRF/T10 diagram. Screw for the end sling plate on the ERG, AEG2.5/3, AND series guns....
The I-25 e-clip fits multiple KWA models, and appears on respective diagrams as M11A1 NS2 part 104, KM4 Series part 242, RM4 part 242, and LM4 PTR part 209.