Found a couple Rifle errors on Target's Exclusive Black Series 6-Inch Chewbacca figure. The first one was reported by Yakface.com in which Chewbacca's Rifle was missing the brown Sliding Fore-stock on the Rifle Barrel. This error is not a one off and many people have found this error and it has even made its way to eBay.
While searching for the first error I came across another which is probably just a one off. Chewy's Rifle is missing the brown Sliding Fore-stock on the Rifle Barrel and also missing the brown Side Handle and Housing on Rifle.
Both errors are completely missing these Rifle parts and they are not loose in the boxes. To view some images of the errors visit the figure's page and scroll to the bottom.