Selling my dytac m4 built as a dmr. Here’s the specs: Externals Axeon can sight Flip up/down zoom lense Flash hider PTS grip PTS stock PTS finger guard rest Internals 16:1 shimmed gear ratio Ported cylinder New compression kit High speed motor JeffTron leviathan EMG hopup unit Rhop patch and nub 520mm 6.01 angel customs barrel