Suggestions on upgrading KWA KM4A1 plastic foregrip to metal RIS?

[Tiptoe]

I'd like to upgrade my KWA KM4A1's stock plastic foregrip to something sturdier like aluminum, 4-railed, and internally roomier for the 9.6v mini.

Has anyone else done this to a KWA and been really impressed with the result?

Did you replace the stock front sight with a flip-up one, or did your kit simply replace the original grip?

After buying & trying several incompatible magazines, I'm sort of reluctant to buy any upgrades that other people haven't successfully tried on their own KWAs.

Cheers!