Let me begin by saying that I am very pleased with the rifle kit that arrived today!

I'm putting together the lower, and I've run into something that is stumping me. There is a spring in the kit that is about a centimeter long, and about 4 mm wide. I believe it is the disconnector spring, but something is throwing me off. One end of the spring is slightly flared, and I'm not sure which end goes into the trigger.

I may have completely mis-identified the spring to boot. Any help with identifying this and how to install it would be greatly appreciated!

Thanks!