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Technosavant · June 19, 2011, 08:05 AM

They're standard. Exactly what you'd find on the upper receiver of an AR-15. A regular AR barrel nut threads right on with no problems.

June 19, 2011, 08:05 AM	#33
Technosavant Senior Member Join Date: May 29, 2007 Location: St. Louis, MO area Posts: 4,040	They're standard. Exactly what you'd find on the upper receiver of an AR-15. A regular AR barrel nut threads right on with no problems.