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What gas block do I need for a 10 1/2 inch barrel — 1 Answer

by EDGAR, from MI, United States Asked on April 14, 2026

Name Rosco Manufacturing Bloodline .300 AAC Blackout Barrel (4.3)
As Low As $145.80 Save 10%
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Answered by Rosco Customer Service, Manufacturer from RI, United States, on April 29, 2026

the Rosco 10.5" .300blk barrel has a standard .750" diameter gas block journal

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