12-09-2017, 06:52 AM
Schrambo Wrote: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?
I just my 12.5" BA barrel in and the gas port measures 0.063. What size drill bit did you use to drill yours out? Where did you gets yours from? Did you just a cordless drill, wood dowel rod, and some oil?