They "look" 16 TPI even though you'd expect 18 with the rounded heel on the receiever. Have gauges coming Wed to be sure.Threads should be “standard” for an AR10/M5/etc. upper receiver.
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They "look" 16 TPI even though you'd expect 18 with the rounded heel on the receiever. Have gauges coming Wed to be sure.Threads should be “standard” for an AR10/M5/etc. upper receiver.