Dekuriru talks about how to maintain the M249 Sportsline AEG from S&T in this video... "In the last airsoft game, a female member said that even a 3kg electric gun is heavy... This time it's a maintenance video of the S&T electric gun M249 Sports Line. It weighs 3700g, so it was much lighter than the full metal M249 made by A&K. One way is to pay a shop to do the maintenance, but I don't have the money, but I have the time, and if there's something I can do myself, I'd like to do it!