reflex bow (Kolias 1988, pp. 214–215). The archaeological finds proved that the. Avars used complex reflex bows strengthened with bone plates (Cs. Sebestyén ...
www.akademiai.com/index/N1K334W005283206.pdf

Using backstriking, so-called reflex-bows, reinforced by bone-plates carved from antlers, required special skills. For this reason, their users must have ...
mek.oszk.hu/01900/01993/html/index20.html

Magyar Bow . In the 1920s a lot of 10th century graves were found. Among the stirrups, sabres and other things, archeologists found long and narrow bone plates. Nobody knew what they were until Cs. Sebestyen Karoly realized that their function was to reinforce the grip and siyahs or horns (szarv in Hungarian) of the bow.
www.atarn.org/magyar/magyar_2/bow.htm