Since I am a Very satisfied owner of a 14.5" Carbine Upper from Paul at BCM… I feel somewhat qualified to answer you question. His Uppers are worth every penny. They are top notch and no short cuts are taken. Here is a 3 rd group I shot using 62Gr ADCOM ammo on my belly at 25 yds using a 4MOA Aimpoint. The first group of 3 was a little to the right and I pooched one to the upper right. after a small adjustment… well… That works for me.
The Accuracy is better then what you will be able to shoot out of it…