We received several 20- and 30-round magazines with the chrome silicon springs for testing. They featured evenly applied finishes, and the followers moved freely up and down in the bodies of the magazines.
After loading several magazines to full capacity, we fired rapid-fire strings with the test rifles canted at different angles. Even loaded to their fullest capacity, the sample magazines functioned reliably.
Backed by the Brownells name, these magazines represent a solid value for the AR rifle owner.