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Posted: 1/4/2015 8:02:51 PM EDT
| I ordered my bbl from Rainier Arms with a BCM low pro gas block pinned to it. Because I need to remove the gas block to install my FF handguard, they only put the pin in half way. Do I still use the set screws in the gas block when I pin it? It has two set screws in the bottom. |
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