Just wanted to give everyone who responded a quick update.
Called TNW gave then the ideas from you all and they will create a non working FS in thier factory to be installed before shipping.
They will take the FS and install a tube capped by a disk which will be even with the end of the cone.
After welding it will appear to be solid and will allow the projectile to exit through the tube as if it were a barrel extention.
Now comes the harder part which is coming up with the money.
Thanks again.