When you install your heat shield, there is a plastic spacer with a tail that attaches to the front band. You must trim this tail to the correct length so it will act as a stop against the barrel ring that goes around the magazine. Take your time to trim this to the correct length. I trimmed mine a hair short and was left with a small space between the receiver and the rear band of the heat shield. Not that big a deal, but I should of done it better.



























