Blackstar airsoft shop in Brazil give more inforrmation abou the Neptune AR15 MARSOC AEG which they carry at their shop... "Learn all about Marsoc, by Rossi. An excellent cost-effective AEG within the Neptune range. With nylon fiber body and metal handguard, it delivers resistance and lightness to the operator in the field. Beautiful. dual tone and with differentiated flash rider is easy to customize with the Picantinny rail. Come along and watch this monster hit the ROF (Rate of Fire) of 16 per second. Watch there and then comment here!"