It used to be that a chromed barrel was junk. Or close to junk in terms of accuracy. You could expect 2MOA accuracy and any better was luck.
However many modern made chromed AR barrels shoot very well.
I have a chromed barrel on an Armalite M4, and it shoots sub inch groups on the bench. The rifle is extremely hard to shoot well unsupported, because of the tiny sight radius, fore attached to the barrel, and light weight of the rifle, but on the bench supported by sand bags, it shoots extremely well.
A shooting bud of mine, a gentleman who has placed several times in the Presidents 100 at Camp Perry, told me he is happy to get heavy Colt chromed barrels. He can get them cheap from people who take them off to build a match rifle, and on a rifle that free floats the barrel, they shoot well.
Still, the bottom line is, you will have to shoot it to know how it does.