[Jim McDougall]

With the 'assembled' nature of these organized groups of 'reivers', while there was a typical range of weaponry and dress, there were no regulations or standards, so 'anything was possible'. Typically on horseback, those mounted would of course not used the huge 'two hand' swords, and these men would have used whatever swords were available. As has been noted however, the most typical weapon was the couched lance. In the 16th century, which seem the period most attended historically, there were many forms of European fighting swords, most of them of types known to be used by the 'landsknechts', German mercenary forces.

The two hander was of course indeed used through the 16th century in Scotland in many cases, but mostly incidentally, as it was not a widely apportioned weapon. As in Europe, these huge swords had been decreasing in general use, and in Scotland, if I understand correctly, many of these had their blades cut down and were used in 'basket hilts'. Perhaps this may have been why the term 'claymore' was used through the 19th c. for the basket hilts, or maybe just a generalized term by then.

In a way I think of the Reivers in the manner of Jesse James during the Civil War, and with Quantrills Raiders. After the war, he and many of these soldiers simply continued their ways though they were now 'outlaws' . When they could no longer operate without impunity, they simply diffused into their own respective clans and no longer operated in the organized groups of before.