Here's some pictures of the real deal Smith Enterprise, Inc. M14SE "Crazy Horse" SDM, just so you have an idea of how close I got my replica (the first image is what I based the build off of):
Pictures linked from the Smith Enterprise site:
http://www.smithenterprise.com
Here's some trivia:
Above the rear pistol grip, behind the receiver, you'll notice a set of rails located there. Any idea what those rails are for or what could be mounted there? My only guess is to attach RIS-mounted sling mounts... agree? disagree?