Originally Posted By prcharlie:
My first DSA upper had a badly canted fsb. The replacement upper had the barrel extension come loose recently. Not to mention that they have serious wait times, check their industry forum. Additinally, you will not find any negative threads in their forum because they delete threads. I would look elsewhere if I were you.
Was your upper one of the nitrate coated uppers? The reason I ask is that they had some issues with the barrel extention coming lose on those. I have not heard of the issue though with the chromed bore and plain bore uppers.