** Shares of Australia's Electro Optic Systems EOS.AX rise as much as 17.5% to A$10.280, its biggest intraday pct gain since August 5
** Stock currently up 2.1%, as of 0057 GMT
** Defence and space tech firm secures contract for delivery of Remote Weapon System for Australian Defence Force LAND 400-3 project
** Contract valued at A$108 million ($71.23 million)
** LAND 400 Phase 3 project is a major Australian Defence Force initiative aimed at modernizing its fleet of Infantry Fighting Vehicles
** Around 5.5 mln shares change hands, 1.4x the 30-day average volume
** Stock has risen 593.8% this year, including sessions' gains
($1 = 1.5163 Australian dollars)
(Reporting by Roshan Thomas in Bengaluru)
((Roshan.Thomas@thomsonreuters.com;))