You can add the uni-nock bushings to most easton aluminum arrows.They will take super nocks or most standard carbon nocks,I like them for the tunability and ease to replace them.I installed them on a couple of dozen 2018 Legacy's.Some of easton come with unibushings,I think XX78 and new camo hunters.Most have to be 20/64" or larger for uni-bushings.I seen in Lancaster Archery that easton makes what is called a X-bushing for 1816,1913 and 1916 that accept X-nocks.The X-nocks fit axis/mfx arrows.I prefer them in my shafts so I can rotate the shaft for fletching clearence.