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Optimal Barrel Length for XCR 6.5 Grendel pistol?
#11
Sounds like they went with the MK 1 (.125") bolt pattern instead of the more common MK2 (.136")
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Optimal Barrel Length for XCR 6.5 Grendel pistol? - by Huckleberry75 - 11-13-2020, 01:09 PM

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