Scammer...stay away from hunterslife72. Not only does he scam, but now he plagiarizes.It's going to depend on the barrel. Some of them have actual Ma-deuce barrels, most don't. An M2 barrel, on an M2 is good for 20,000 or better. but I figure even if the thing is only good for say, 1,000 rounds, it will still have 90% of it's life left when I leave it to my son in 25 years... 'cause i have shot a lot of .50BMG, and i don't want to shoot no .50BMG rifle..lol esp that little jobber that goes on an AR receiver..