despite having several tattoos while in the marines , sgt. daniel knapp has been denied re-enlistment because of his ink .
after leaving he got a pair of crossed rifles and 0311 designation for marine riflemen on his forearm .
the tattoo contravenes the organization 's strict policy concerning size and placement .
` my tattoos never stopped me from shooting anyone , ' said knapp of jacksonville , north carolina .
he is now considering joining the army which has less stringent rules about body ink .