I'm giving 5 stars because of the actual product itself.
The heavy fluted 18" 6.5 Grendel barrel I ordered was really nice and shoots 1 MOA on average days and easily .5 MOA when I'm doing my part. For the actual price and hunting purposes, you can't beat it with a stick.
One thing they do need to improve upon, is the time it takes from when the product is ordered, until it actually ships. If the site says a product is IN STOCK, it should at-least be shipped within the following 2 days.
If you guys have that many orders that our stuff is taking a week JUST TO BE PULLED OFF THE SHELF. You probably should hire more warehouse personnel and get the ball rolling a little quicker with item pulling, packaging, and shipping.
Other than that I am very pleased with Classic Firearms and their customer service.