AK5 + AK7 = AK57 (Triple 19 >>> T19!)
S/M/L: 23mm / 28mm / 33mm, measured from thread edge to joint between flight and shaft.
S: total length* 64mm shaft length 23mm - 1.25g
M: total length* 69mm, shaft length 28mm - 1.33g
L: total length* 74mm shaft length 33mm - 1.45g
(*Thread not included)