I bought two BC mags for my 10/22 this spring. One black one, called Hot Lips and one clear one called Steel lips. The Hot lips has pink plastic lips, the steel lips has what appears to be cast stainless feed lips. The hot lips mag fed flawlessly from day 1. The steel lips mag required time to "break-in". It seems the follower lost tension when you pushed in the first few rounds and froze down, not placing tension on the rounds. This slowly corrected itself, and now the follower keeps tension on all rounds, 1-25. It works as well as the factory ten rounder now. I hope that info helps. I'm not sure about whether clear vs black means anything, it might, but its mostly whether its the steel lips or plastic "hot lips".