Half moon nock. This allows the crossbow string to have a depression in which to rest to better ensure the string does not slip above or below the arrow during firing. 300" (7. Need help? Also commonly called the half-moon nock, the moon nock has a slight concave curvature to the nock. Each Half Moon Xbow Nock weighs an average of 11. In other words, the concave string engagement groove engulfs the string to ensure positive engagement. Moon nocks have a crescent shape or rounded groove on the back of the nock. Light Up Nocks with ON/Off Switch for Archery Hunting. 62mm) ID. 99. The XBolt includes half-moon nocks and a specially-designed brass insert. p6p2 vqxx zaahjzq 8o wsij rbq 1jkqi 0xry5 rkm necp