Orlites from what I understand is a tad longer than steel mags but I never had any issues with them locking properly in my AA372. Is yours original Galil or Golani? What receiver?
New Orlites are a beech, they fit very tight. I had problems with both my Golani and an IMI Galil. you may have to remove a little material for them to fit. Or insert and remove 200 times, they will wear in.. :bang