It is not necessary to change the nozzle to the extended King Arms nozzle. However, the BB will not go in as much as it could. I do not know the effect on accuracy this may have. The nozzle is in the conversion kit because after installing the King Arms VSR chamber, the nozzle should be extended to compensate for the additional space between the hop up nub, bb, and bolt nozzle. KJW M700 bolt assemblies are available at evike for about $40. I do not know if the KJW M700 bolt will fit the G&G G96. I do, however, know that it WILL fit the Tanaka M700 series of guns (I have both the KJW M700 and Tanaka M700 AICS).