Looks like a spring-loaded round ejector tube on the barrel? Good idea.
That is my only peeve about the CCM rifle. Yea, ejecting an "empty casing" is cool and all, but in a real game I don't want to be having to keep track of machine aluminum casings that probably ain't cheap enough to be considered even semi-disposable.
There's no disputing the accuracy of this rifle though. Everyone says they shoot very nice.