The Full Metal Jacket arrows by Easton Archery get a new, classic look with the limited-edition FMJ Legend Micro diameter 5MM Full Metal Jacket arrows. These arrows have a dual composition consisting of a carbon core for strength and an aluminum jacket for accuracy. This design creates pass-through impacts and easy-to-follow blood trails. Plus, the aluminum jacket makes pulling shafts from targets easier than carbon-surfaced arrows. DeerTech Online. Season 1. Episode 7.