How many large capacity magazines are there in Connecticut?
We were unable to find this number, but the NSSF estimates that it could be in the tens of millions. NSSF used the following methodology to arrive at this figure.
Based on Connecticut's percentage of National Instant Criminal Background Check System checks in the Unites States, NSSF estimated that the number of firearms owned by Connecticut residents is about three million. About one million of these firearms are handguns, of which 21%, or 231,000 use large capacity magazines. About 1.2 million are rifles, of which 30%, or 372,000 use large capacity magazines. Assuming four magazines owned for every firearm (assuming every firearm comes standard with at least two magazines), NSSF asserts there are over 2.4 million large capacity magazines in Connecticut that originated at the retail level. The NSSF final figure is larger than this because it counts firearms already in the state and those not purchased at the retail level.
Links provided by ssgmarkcr with the following observation: "Some are trying to paint this as people waiting till the last minute, but it seems to me that its more likely that such a low level of items registered is a whole bunch of people deciding to say hell no."