Buy this Modular RAS Forend from Hephaestus for your beautiful GHK's AKU Series. Completely made out of metal so you know it's designed for stability!
Normally, you'd have to pull the charging handle back on the right side as you would any AK, but this changes that a little. Instead of JUST the right side, the charging handle will also be on the left side ON the fore grip making it so much easier for right handed users. Plus it makes it feel like am MP5 and who doesn't like that style of charging handle?