Elite Tactical Systems Group has transparent magazines for Glock pistols.
“The ETS transparent Glock mags take visibility and safety to new level. Users are able to quickly determine the round count and ammo type from any viewing angle,” according to ETS officials.
“These mags have been through rigorous testing including several 1000s of rounds ran through them without failure, using all generations and size of Glock pistols.”
Currently, transparent mags are available for Glock 17, 18, 19, 22, and 26 pistols and range from $17 to $22.