I'm working on a mk12-ish build and was gonna get a bartlein or kreiger barrel from compass lake. But WOA is having a black friday deal on their SPR barrels for less than half the price of a CLE. Seems like both companies are highly regarded here from what I've seen. Anyone know what blanks WOA uses or recommend one over the other? This would be running DMR/gas gun matches out to 700ish and just because I want a mk12.