NORTHEAST MP2A1 GBBR Upgrade Kit
 
This is the upgrade kit for 2nd batch of MP2A1 GBBs with Serial No: NGS072220000 - NGS072222300
If you are purchase your 2nd batch MP2A1 GBB from our Octagon Airsoft Online Shop, please prvide your order number and serial number (on the inside of the grip) for refund (product values US$30 only without shipping cost)