I'll drop my two cents in hopes to save you the hassle I went through. I wasted a ton of time waiting for a carbon 204 barrel. I ordered a 22 inch 204 Ruger ar15 barrel from BSF, waited 15 months for it. Shows up, shoots 18 inch groups @100, sent it back for warranty. Manufacture found a portion of the carbon had failed, sent me a new replacement 3 months later and it shot even worse than the first. Sold it for a huge loss and ordered a Shaw on Black Friday for a 1/4 of the price. Waited 10 months, got it, and it shoots around 1/2 inch @100 with 40gr vmax factory rounds. A huge improvement out of the same gun that was untouched other than a barrel change. I personally will never buy another carbon barrel again.