FCW Swordfish Conversion Kit for MP5 Series AEG -Part
 
High Strength Full metal / Aluminum Construction
Provides a bridge for the entire rifle to prevent wobbling.
Kit includes all necessary hardware for top rail and front end conversion.
Works with MP5 A4/A5 A5 and similar series Airsoft rifles, especially for Plastic Body Like TM, CA (Plastic Sportline), JInggong, ICS
Maybe need modification on different brand MP5