 The single coil mainspring is positioned around the barrel instead of to the rear of the barrel as found on other Nambu pistols.The grip is smaller than other Japanese pistols and is finished with smooth wood but according to author Jeff Kinard, are more comfortable for use by men with smaller hands.The magazine holds a maximum of six rounds because of the smaller grip and it is considered difficult to reload the weapon, with pressure from the bolt holding it inside the pistol.