I could not have been happier when I received and unwrapped the barrel for my Aero Precision M5E build. Machining was perfect, fit and finish were top-notch, and it was EXACTLY as ordered. The customer service was awesome too - the X-caliber rep I talked to was great, we discussed fluting options and I ultimately felt comfortable with the specifics of my order - 24" Cromo, heavy contour, 8" twist, in .243 Win. If the attention to detail in producing my custom barrel is an indication, I full expect that this rifle will be a tack driver. I will certainly be doing more business with X-caliber and will steer my shooting buddies to their products.