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View Full Version : Hooded Aperture ?

BBHall
06-24-2009, 12:49 AM
I have a RR hooded aperture and would like to know the thread size. Would anyone happen to know? Thanks everyone.
Kerwin Law
07-01-2009, 08:28 PM
I don`t have a RRA AR, but mine use 1/4-32. I got a tap for it at Brownells.