i've bought some stuff from the seller and did asked about that.

his opinion was, it's ok, but quality not as nice as actual nerf product. trigger might require modding.

but your reason to buy is somewhat  . rival balls are not that cheap or easily attainable. to shoot stray cats and dogs, look around for those cheap airsoft  springers. usually found at some random kedai runcit. goes for about rm10-20. you don't even have to hit the target, just shoot at your gate to cause the "ding" sound and they will run. yes, i do it all the time  .

Get a 'pressurised' type soaker. Water will not harm/hurt the cat and you don't need to pick-up the ammo back.

Or just buy a cheap foam type water cannon for pool use.