I believe that you have the 10th Anniversary Edition confused with the LCP Custom. The two are similar in the way that they both share a skeletonized aluminium trigger, but they differ in the way that the LCP Custom has a high polished blued slide, high profile glow sights, and a stainless steel guide rod.
The guide rod on the 10th Anniversary Edition is an ordinary blued guiderod, only the slide is Stainless Steel, and I don't know anything about the recoil spring being any heavier on the 10th Anniversary Edition either.