Krisrom

I have recently purchased a Bell m203 to fit under my main rifle which is a G&G cm16, however there appears to be quite the cab between the rail and grenade launcher. I am unable to find a two part hand guard to fit with the launcher due to the hand guard being of metlock. is there another/better way of attaching the launcher to this gun P.S Is there a way I can upgrade my handguard from the one it has to another. It's hard to find handguards for a Wild Hog in the UK