change_weapon_model

private Entity GetCurrentWeapon(Ped ped)
{
    return  Function.Call<Entity>(Hash.GET_CURRENT_PED_WEAPON_ENTITY_INDEX, player.Character);
}
private void ChangeWeaponModel()
{
    Entity weap = null;
    Object weapObject = null;
    if ((weap = GetCurrentWeapon(Game.Player.Character)) != null)
    {
        if (weap.Model.Hash == WantedWeaponModelHash)
        {
            weapObject = Function.Call(Hash.CREATE_WEAPON_OBJECT, WantedWeaponHash, -1, weap.Position.X, weap.Position.Y, weap.Position.Z, true, weap.Heading/*Not sure about the heading, might need tweaking*/, 0);
            if (weapObject != null)
            {
                    weapObject.AttachTo(Game.Player.Character, playerHandBoneIndex, weapObject.Position, new Vector3(objRot.X, objRot.Y, objRot.Z));
                    Function.Call(Hash.CREATE_MODEL_SWAP, weapObject.Position.X, weapObject.Position.X, weapObject.Position.X, hashRadius, wantedWeaponModelHash, newWeaponModelHash, true);
            }
        }
    }
}