KWA glock 17 upgrade parts

[mr.m4]

Hi people

I have a glock 17 made by KWA. I want to upgrade it to make it shoot loud and give a harder recoil. I have been to an airsoft site and I saw some1 with a glock 23 and it shoots like crazy and really loud. However I didnt have time to ask him what he upgrade but I am thinking of buying the following.

1. Upgrading gas valve
2.Enhanced recoil spring guide.

Is there anything else I can do to upgrade this gun or should I buy something else to make it worth upgrading?