Thanks guys, and thanks for those measurements MMcfpd, that is ecaxtly what I was looking for. And I believe you are correct SpecOsp-13, I got some of these (carbine) springs fron people who sold them as rifle springs.
Does anyone have any info/ideas/opinions if springs at the longer or shorter end of the acceptable length range would be better in a particular application carbine or rifle)? For example, would a rifle spring, which is within specs from 11.75 to 13.5 inches be better closer to 11.75 or better at the longer end of the range, 13.5"?...Thanks all....<><....:)