the assassin stole his way , catlike , to the corner of the house nearest the beach and carefully unpacked the contents of his backpack , extracting two spare 32-round magazines for the gun , a black nylon rope with a grappling-hook , three grenades and four smoke grenades , a fiber optic scope on the end of a black aluminum telescoping rod , a heavily modified sniper rifle with a collapsible stock , a silencer and ten-round magazine for it , and a waterproof camera .