First time shooting either weapon this past week. M-249 aka SAW. Accurate as all get out jammed like mad. Probably a dozen jams in 200 rds. Switched to a different gun and still had several jams with the 2nd gun. It is no wonder USMC is looking at replacing it with an HK 416. M-240B No jams but harder to hold on target. 6-8 rd bursts are about all that can be held on a point target. Had a great time training with my marines can't want to go train some more.