My goal is to spawn an {63E8322E2ADD4AA7}Prefabs/Weapons/Rifles/AK74/Rifle_AK74_GP25.et and manually clear the grenade launcher dynamically via script.

I tried to clear all the barrels via BaseMuzzleComponent::ClearChamber and I tried getting the magazine component from the barrel and then do BaseMagazineComponent::SetAmmoCount(0) on it, neither of which had any effect in 0.9.8.50.

This happens past EOnInit.