Hi all.
So I’ve slowly but steadily received parts for an upper I’m building. I’m pairing a PSA 16” 7.62x39 barrel with the PSA 15” free-float handguard. While dry fitting the barrel into the KS-47 upper receiver, I saw that the timing of the barrel nut is going to require a bit of shimming. I’m confused about the size I’ll need…I’ve seen options for both AR-15 and AR-10 barrels. I don’t know which of those two “footprints” is going to match my setup. Im assuming the smaller, given that the KS-47 is much closer in size to a 5.56 platform. Anyone here have firsthand experience with a build that can make a recommendation? Thanks in advance.