Have you ever thought the Quake 2 viewmodels could use more detail? Looking for a way to spice up your next playthrough of Quake 2? Look no further than Quake 2 Enhanced: Definitive Weapons Pack! This mod seeks to bring the high-fidelity gun world-models from the Quake 2 Enhanced Edition and slot them into the viewmodels using the new md5mesh solution. Lovingly created by Millenia3D, these models bring a level of detail not seen in the pre-Nightdive remaster viewmodels.
I have a two hints for you. Raise the rocket launcher to shoulder level, just like it supposed to be (from pickup model you can see shoulder buttstock). Also you can make a magazine for it, just like it was on PS1 port. It will hide rockets, that appear from nothing.
+1 for Parado's idea
I'll second the idea about attaching some kind of a portable ammo magazine to it, not for the reason to hide the rockets though, but to show that they do load into the weapon from an ammo source, not magically out of thin air. The classic height is good, no gimmicks necessary.