Third-age range legs are a members-only piece of third age armour that are part of the Third age ranger set. To wear the legs, 65 Defence and 65 Ranged are needed. Third age range legs can be either obtained by chance with the completion of a Level 3 Treasure trail, bought from another player, or bought from the Grand Exchange. It cannot be made using the Crafting skill. It is rarely used due to its high price.
It was long thought that the chances of obtaining a piece of third-age armour was of about 1 in 10,000 (according to Paul Gower), and in 2010 Mod Maylea stated that the odds are lower than 1 in 100,000 . However, a livestream with Mod Simon and James revealed the mechanics of Treasure Trail rewards in detail, meaning the actual chances could be calculated: approximately 1 in 16,896 per item roll for any of the 12 parts of third-age equipment, or approximately 1 in 202,752 for a specific part, per item roll - with an average of 5 item rewards per Trail, this gives approximately 1 in 3,380 for any part, or 1 in 40,551 for a specific part, per Trail completed. For a more detailed breakdown of drop mechanics and calculations, see Treasure Trails/Rewards#Hard.