Shirabe
小 口径
Common Noun
English jmdict
1
noun (common) (futsuumeishi) aperture;bore;calibre;caliber
English jmdict
1
noun (common) (futsuumeishi)nouns which may take the genitive case particle 'no' small calibre;small caliber
"Situation report." "At present 4 in sight. At most probably 7. Holding small calibre arms."