Glock, OEM Plus Two Magazine Extension with Magazine Insert, 9MM, 40S&W & 357 SIG, Black,
Adds 1 round to .40 and .45 GAP guns.
Adds 2 rounds to 9mm guns.
Will not fit 10-rd magazines, except G26 and G37 magazines.
Models: G17, G17L, G19, G22, G23, G24, G26, G27, G31, G32, G33, G34, G35, G37, G38, G39 (including Gen4)
Manufacturer Part #: SP07151 and SP07165