Madbull - Shark Hop-Up Bucking w/ Fishbone Spacer

 Features: Three fin design reduces double feeding as well as improves hop up contact Improves compression and in turn a possible FPS increase Specifically designed for AEGs shooting 350 or higher FPS Fishbone style spacers improve contact over standard spacer design  Part Number 28917 Material Rubber Color Red Manufacturer Madbull Compatibility Most AEG Rifles Shooting over 350 FPS or HPA  DISCLAIMER: Please use discretion when installing custom parts as fit and compatibility may vary. Some modification may be required. Professional installation recommended.