Soon to be released are two products from PTS Syndicate. The first one is the new PTS Barrel Nut Key for the PTS Mega Arms MKM AR15 GBB which will allow you to remove or install the barrel nut of the GBB-R using a normal spanner. The second one is the PDR-C Pistol Grip Extenstion that gives you more storage and extending the battery compartment by 22mm with secure snap lock and vented base.