Mass Effect N7 Eagle Gun Papercraft by arbetep. You can see this heavy gun model in Mass Effect 3.
The N7 Eagle is included in the N7 Collector’s Edition Pack as a bonus item for players who order the Collector’s or Digital Deluxe Edition of Mass Effect 3.
Eagle is named after the Desert Eagle, a classic handgun which gained a romantic reputation among gun collectors, thanks to its popularity in 20th- and 21st-century Earth action movies.
Mass Effect N7 Eagle Gun Papercraft Requires 14 sheets of paper and comes in PDO. There’s also a PDF version on arbetep deviant page.