1. Add a "PreviewRenderAttributes" Custom attribute in InventoryItemComponent to any existing weapon attachment (pso1 for example)
2. Add a custom preview model (armchair in this case) {F3055269}
3. Attach pso1 to svd and open weapon inspection menu.
4. Armchair visible in inventory and weapon inspection menu, everything is fine in game.
{F3055268} {F3055272}