Glock Full size 9/40 +4/+3rd extension
This magazine extension is designed to add +4/+3 rounds to Full size Glock 9mm/.40S&W magazines, coming to a total of 21+1 9mm or 18+1 .40S&W.
Deep serrations on all sides allows for excellent grip in any weather conditions.
Simple and reliable locking function that features a captive set screw to prevent it from being lost.
The aluminium version is available in Cerakote Armor Black
Length from the bottom of the magazine: 0.54" (13.7)mm.
Weight: Aluminium - 0.74oz (21g)
Material: 6082-T6 Aluminium
Fits the IPSC box.