A buckler (weapon) is a small shield worn on the forearm.
Ho-Tu, his hook knife dripping, a buckler on his left arm now stood beside us.
Book 5, Assassin of Gor: Page 346
... the primary defense is a small round buckler...
Tribesmen of Gor, page 302
... buckler and dagger, ax and buckler, dagger and whip, ax and net, or the two daggers...
Book 4, Nomads of Gor: Page 124
The crowd is fond of seeing various types of weapons used against others, and styles of fighting. Buckler and short sword are perhaps most popular, but there are few weapons on Gor which are not seen over a period of three or four days of the games.
Book 5, Assassin of Gor: Page 189