I'm doing some research on subsonic ammo, and I'm trying to find specifications on gas port sizes for the AK-47. I've seen a few numbers, but they are all over the map on different sizes. Is there a standard opening size for certain barrel lengths, or is it common for a large difference in gas port opening sizes on the AK?
I'm showing this so far:
223 Rem in AR-15- gas port .065"-.067"
300 Blk Out gas port- 14.5" barrel= .081" opening, 9" barrel .125" opening
AK-47 opening ???
Any info? Thanks!