Built a 6.5G BA 12.5 upper with the usual components, Vltor Mur 1A Upper, GB Bolt, Vltor GB(non-adjustable), WMD carrier, and Chandler handguard...
Short stoking with full power loads over 2 trips to the range... Pulled the GB and the port was .055" using a drill bit... Drilled it out (my first time) to .073", and everything is running great...
It's accurate and I'm happy, but has anyone else seen a small gas port on 12.5" BA barrels?
Short stoking with full power loads over 2 trips to the range... Pulled the GB and the port was .055" using a drill bit... Drilled it out (my first time) to .073", and everything is running great...
It's accurate and I'm happy, but has anyone else seen a small gas port on 12.5" BA barrels?
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