RA-TECH -Hopup Rubber for KSC/KWA Magpul M4 GBBR
RAG-KSC-024For KSC/KWA LM4 PTR GBBR Hop up Rubber
Not compatible with System 7 Series.
For KSC/KWA LM4 PTR GBBR Hop up Rubber
Not compatible with System 7 Series.