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The Criterion Hybrid contour match grade .308 AR barrels are perfect for those who desire extreme accuracy without the extra weight of a thick barrel contour. These barrels come with a M118LR chamber, which has a longer throat, which improves performance with heavy bullets and reduces wind drift over longer ranges. The barrels are suitable for both .308 Winchester and 7.62x51 ammunition and come with an already installed barrel extension. These barrels are compatible with DPMS, Remington, and Fulton pattern rifles and can handle muzzle devices with a 5/8x24 thread. The barrels have an indentation near the gas port for easy installation, but the headspace needs to be checked before installation. The barrels are available with chrome lining and come in 16, 18, and 20-inch lengths. Furthermore, these barrels are button rifled and hand lapped, thus ensuring that their bore uniformity is consistent.