I was replacing my trigger today in my remington 700 cdl. When I took it apart I didn't notice droping a spacer but found one on the floor after re-assembling the rifle. I took the gun apart and there is a black sticker like spacer between the front part of the action and the stock, there was none in the back. Does this spacer belong in the back? Do they make any difference? Like I said I didn't notice it when I took the gun apart, I guess its my fault for not paying closer attention. Thanks