MagMax
Compatible with most 9mm double stack magazines. The below list has been verified as compatible: 

Hellcat & Hellcat Pro
H&K VP9SK G19, G17, 43X & 43x sg stack 10rnd
Glock 26 sg stack 10rnd, Glock 48, Glock 380 P365, P320 CZ, P10C, P09, P10F, CZ Shawdow 15rnd
Beretta 92/M9 FN Reflex 9mm
S&W MP2.0 9mm, SD 9mm, SD 40
Sig Sauer SP2022
Taurus PT111 g2 12rnd, Xd 9mm, SA 35, Xd 40