The MP7 is back in favour in EB Airsoft with the KSC Gas Magazine for the MP7 SMG now in stock. Other interesting bits are FMA Fast Magazine Pouch for GBB MP7 Mag and the FMA MagClip for GBB MP7 Magazine which are coming soonk. No details yet if these accessories are made specifically for a specific brand,  or are compatible with the other gas magazines from Tokyo Marui and VFC.