All this negative talk about the Bushmaster Carbon 15 got me stirred up. I took mine to the range with about 700 rounds yesterday, mounted a new Simmions 4-18x44 optic on it and zeroed it at 100 yards. Then set a series of targets from 25 yards , 50 yards,75 yards and 100. I then loaded 5 mags at a time and put it through as much hell as I could. Some of the ammo was even Metal cased, which is normally against my morals unless it's Hornady Steel Match. The rest was a mixture of PMC 5.56/.233 and the same in Federal. After running it straight for about a good solid hour I had one malfunction and it was due to a faulty Magazine.
MY barrel is a 1 in 9" and 6 lands and grooves. I am normally using 55gr, but also some 62grain and it worked like a champ. This is not the first time I have put it through the motions in this fashion and it was holding groups as well as any. So I am still waiting for all this stuff to go wrong...I will be the first to admit when it does, but until then I like my Bushmaster. And I know there are better AR's out there...not saying they are not, but for $700 this is a great little AR. IF you paid more than $700, then you got ripped.
Bro.Mac
US Army Veteran
Desert Storm 90-91'