Possible Clues:

• Nazi police arrested French poet after tip off, firing these?
• More than one weapon appears greasy, though every one gripped
• Hand-held weapons
• Weapons that don't reach very far?
• French poet not entirely welcomed by outsiders in Soissons, those of little calibre
• They're in touch with light-fingered types presumably with weapons
• T. Rex had such lightweight pieces
• Some dinosaurs had these weapons
• Such weapons as come shortly to hand?
• Handy enough for infants and infantry alike