Evike.com eBalls for Airsoft 40mm Gas Powered Shell Grenade Launchers (Qty: 12)

"These are advertised as being lunchable from a 40 mm grenade launcher /shell. I bought the matrix m203 (I may be wrong but I believe matrix is an evike in-house brand that just rebrands other products) these balls create far too tight of a seal. They barely launch if not at all. When my shell is filled up with green gas. With red gas they will go maybe 15 ft. It is very underwhelming in the complete opposite of what I imagined. I'm hoping CO2 could be the saving Grace for these things but so far they just slip out of there like a weak fart