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to provide a fast, secure, and enjoyable experience. by JAG, from MN, United States Asked on July 3, 2018
The barrel extension is LR-308 (DPMS Compatible), they will be compatible with the PSA Gen 2 uppers. In regards to bolts, they should have appropriate head spacing for PSA, but they will not be matched specifically because that is only done specifically by the manufacturer if both parts are from the same manufacturer.