Hey guys. I'm interested in buying a flatline ops slide cover plate for my M&P Shield 9mm, but i had a question for anybody that knows specifically about the operation of the slide. This is what the back of the cover plate looks like. I notice it's missing the rectangle in the middle, which the stock part has on it. Is this rectangle crucial to operation and reliability?
Flatline Ops Slide Cover Plate by
Christopher Wilson, on Flickr