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Will these Endeavor 100 Series Uppers interchange with the CMMG MK3 Endeavor 300 Series: Model 65A9F7E in 6.5 Creedmoor? If so, what magazine? — 1 Answer

by Mark, from TN, United States Asked on August 26, 2020

Name CMMG, Inc ENDEAVOR 100 Series Upper Receiver Group
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Answered by Brandon, member, from UT, United States, on March 10, 2021

If you already have the CMMG MK3 Endeavor 300 Series Model 65A9F7E in 6.5 Creedmoor, the Endeavor 100 Series in .308 or 6.5 Creedmoor will match up. It will still accept AR10-style magazines.

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