[TF2] The Stock Grenade Launcher has no collision model

[AtomicTEM]

The stock grenade launcher model used in-game does not seem to have any collision model like other weapons such as the Iron Bomber. This can cause lag and performance issues when players die and model of the weapons starts interacting with surrounding terrain and objects such as terrain and playermodels.

[KaelaSavia]

Ideally the lag/performance bug itself should be fixed, as I assume this happens with every model without collision model that tries to simulate physics.