** Shares of electric aircraft-maker Archer Aviation ACHR.N rise 4% to $7.7 in premarket trading
** Archer said on Monday it would supply its proprietary electric powertrain to third parties
** Co has agreement to supply powertrain systems for autonomous air vehicle, Omen, made by defense supplier Anduril Industries and UAE-based EDGE Group
** UAE has placed an order for 50 Omen systems
** This marks a new revenue stream for Archer
** Six of eight brokerages rate the stock "buy", two "hold"; their median PT is $12.5 - data compiled by LSEG
** Up to Monday's close, ACHR fell 23.5% YTD
(Reporting by Aishwarya Jain in Bengaluru)
((Aishwarya.Jain@thomsonreuters.com;))