Finally, more than just a replacement hop for the M249 family of guns. The Bullgear improved hop up chamber supports M249s from A&K, Cybergun and Classic Army. Improved rotary style hop, CNC construction, finally deliver the edge that M249s have been needing.
**Please note that this hop up unit will NOT work with the newer Cybergun Featherweight M249 versions. They only work with the older version Cybergun M249's**