I was hoping somebody might know the exact specifications so I can put in a spring order for a pre ban Beretta 92 30 round magazine I have searched high and low and can't seem to find any data to help me put in my order. I found a spring site that would custom make them for me but I do not know the dimensions of the spring I'm looking for. I bought the magazine with my first ever gun purchase and still haven't had the opportunity to replace the spring so any help would be very much appreciated.