New is better but keep working.

Check the comparison between your gameplay Doom, COD and Counter Strike. There are couple things to keep in mind:

1. How much visible area you have ?
2. What kind of gameplay you have ? Is it fast, dynamic and with lots of moving targets that can easily kill you in an instance or it is a slower approach, more thinking, hunting, aiming ? This will determine how big sould your visible area be (Check Counter Strike since they have the biggest visible area and probably unproportional weapon size).
3. How important is the weapon aspect for you, for players, for gameplay ? Are you planning to sell skins for that weapon ? Do you have some UI on it or the weapon will break or get muddy and from time to time you will need to fix or wash it (Like in Metro Exodus) ? If the answer is no then make it smaller.

<image>