A word of caution: You are walking on thin ice in certain areas regarding the PanzerFaust and the K98 in spite of the condition.
Be sure to check with your local "sheriff." Some do not look kindly on these weapons even though ground dug.
Some police districts take a very bleak view of these. It all boils down to how they read the law. Silly but true.
There are examples, where is is demanded, that a groud dug item is sawn in half length wise.