Our single stack, Quad "Kangaroo" style magazine pouches are designed to be a secure universal fit for almost any 7-8 rd single stack .45acp magazines. The extended option will increase the height of the pouch  to accomindate extended base plates and or magazine lengths asscosiated with 10 rd single stack .45acp magazines.
 
Magazine Sizing 
Size 1
All Single Stack .45acp magazines. 
 
SIZE 2
Glock 43x/48 10rd 9mm
SIG P365 17rd 9mm
SIG P320 17rd 9mm
SIG P226 15rd 9mm
SIG P229 15rd 9mm
SIG SP2022 17rd 9mm
Smith & Wesson M&P 2.0 17/15rd 9mm - .40 S&W
Smith & Wesson Shield Plus 13rd 9mm
H&K VP9 17/15rd 9mm
FNH 509 17rd 9mm
CZ P-01 15rd 9mm
CZ P-10C 15rd 9mm
Walther PDP 15rd 9mm
 
SIZE 2 EXTENDED
Glock 43X/48 Shield Arms 20rd 9mm
Smith & Wesson M&P 2.0 21rd 9mm
SIG P320 21rd 9mm
SIG P226 20rd 9mm
H&K VP9 20rd 9mm
FNH 509 24rd 9mm
CZ P-01 17rd 9mm
CZ P-10C 18rd 9mm
Walther PDP 18rd 9mm
 
Size 3
Glock 19/17 15/17rd 9mm
Glock 22
Glock 21
Glock 41
Smith & Wesson M&P 2.0 10mm/.45acp
USP 15rd 9mm
USP 12rd .40 S&W
 
SIZE 3 EXTENDED
Glock 19x
USP 20rd 9mm
USP 17rd .45acp
 
SIZE 4
All Polymer Body Double Stack .45acp magazines. Metal body Double Stack .45acp magazines will fit slightly loose.