Coach Stevie Gemmell will announce the 12 players to compete in Glasgow no later than next Wednesday (1 May).
Scotland extended squad for the Emirates Airline Glasgow Sevens at Scotstoun Stadium on Saturday 4 and Sunday 5 May: Chris Dean (Scotland 7s EDP), Struan Dewar (Scotland 7s), Michael Fedo (Scotland 7s), James Fleming (Scotland 7s), Alex Glashan (Scotland 7s EDP), Colin Gregor (captain) (Scotland 7s), John Houston (Scotland 7s), Lee Jones (Edinburgh Rugby), Michael Maltman (Scotland 7s), Byron McGuigan (Glasgow Warriors), Scott Riddell (Scotland 7s), Colin Shaw (Scotland 7s), Andrew Turnbull (Scotland 7s) and Lewis Young (Scotland 7s EDP).
Not considered due to injury: Neil Herron (knee), James Johnstone (abdominal), Mark Robetson (abdominal), Russell Weir (knee) and Gregor Young (shoulder).