This Duramag magazine is built with uncompromising steel, ensuring years of reliable use. The tough steel is able to withstand many environmental effects, from extreme impacts to incredible temperatures.The high-visibility (orange) follower is an effective safety addition, alerting you to your magazine being empty and the chamber being clear. The anti-tilt design makes for easy loading, eliminating any frustration with rounds being tilted or the follower getting jammed. This polymer follower works cohesively with the steel spring to provide the best feeding and loading processes a magazine can be capable of. There is a witness hole on the side of the magazine, alerting you to how much ammunition you have left to load or to fire. The steel base plate can be easily detached for any desired cleaning or maintenance. Since this magazine is capable of holding up to 10 rounds, it is compliant with all state regulations regarding magazine capacity.