GP-MEB015DE

-For Marui M4 / M16 Series & G&P F.R.S. Series

-For M4A1 Extended Battery Buttstock (GP416 / GP417 / GP418)

Package Included:

-New Dust Cover Set

-New Bolt Cover

-Metal Hop-Up Set

-Receiver Pin Set

-Forward Assist Knob

-Adaptor