2.5X OPTIONS - EXTERNAL AUDIBLE PORT, CONCENTRIC RING SITE KIT, EXTRA TF LINK, THUMB SCREW
2.5X OPTIONS - 2
External Audible Port: (Black Only) LEFT EAR $26
External Audible Port: (Black Only) RIGHT EAR $26
Concentric Ring Sight Kit: $385
Extra TF Link $40
Extra Thumb Screw $5