You will most likely need to shim the inside of the pouch to accomplish a "snug" fit for CZ P-01 magazines. Left in stock condition, unloaded magazines will fall free if the holder is turned upside down. My fix, a small strip of 3M bath tube grip tape applied to the inside of the pouch fixed the problem by increasing magazine purchase.
Pros: Great quality and value
Cons: Loose fit on the mag.'s
This review was written in the old system and had content requirements that are different than reviews written today.