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- Silverback MDRX POM Piston Head Ring Gliders (2pcs/set) SBA-APH-02Special Price $4.24 Regular Price $4.99
- Silverback MDRX Nozzle Assembly (modify version) SBA-NZE-02Special Price $15.29 Regular Price $17.99
- Silverback Steel Variable Mass Piston Body for SRS & TAC41 SBA-BPS-33Special Price $21.24 Regular Price $24.99
- Silverback Advanced Piston Head for Original SRS & TAC41 'AEG' Cylinder Head Out of Stock SBA-BPH-01$38.99
- Silverback TAC 41 Airsoft Advanced Piston Head for TAC41 'GBB' Type Cylinder Head Out of Stock SBA-BPH-02$44.99
- Silverback MDRX Replacement Screw Set (Gearbox only) Out of Stock SBA-SST-51Special Price $3.39 Regular Price $3.99