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Archived [ARCHIVED THREAD] - New to me Upper with KAC URX3.1 rail- is this enough gas block clearance?
Posted: 12/30/2020 7:34:21 PM EDT
I got a new to me upper, with a keyhole URG, KAC URX3.1 rail and BA Hanson barrel and gas block.
I’ve read these URX rails can have issues where the gas block contacts the rail causing accuracy issues.
Mine has approx 1-2 mm of space between the gas block and rail on one side. Is this G2G?
Pictures here:

Pics

Thanks

Link Posted: 12/30/2020 8:45:13 PM EDT
[#1]
What profile of the barrel between gas block to barrel nut.

If reduced way down like a government profile battery  to reduce it weight, may have some problems when the barrel heats up and has more whip, but if straight/med weight barrel, will be fine.
Archived [ARCHIVED THREAD] - New to me Upper with KAC URX3.1 rail- is this enough gas block clearance?
Page AR-15 » Troubleshooting
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