Is there a way to pull an apk for an app than came preloaded topic

There is an app that came with my phone Samsung Galaxy s2 (t989D) running 4.04. I'd like to pull this app and use it on a custom rom. Is there any way to pull the APK off the phone? I know there's ways to pull apks for apps you've downloaded from the market. Would these methods apply for preloaded apps?