Couldn't find by searching , so I'll ask here. I'm building a Aero Precision M5 in 6.5mm creed. Bought the above handguard so that the color would match. Found out that my ar15 barrel nut wrench would fit the nut , but wouldn't fit over the barrel diameter. Contacted Aero Precision, and was told that they use a Tapco armorer's wrench in their shop, which means I have to spend $45_50 dollars to complete my build....does anybody know that the Tapco wrench will fit over a barrel shank diameter of 1.193 Bartlien barrel, chambered by Craddock Precision. Any help would be great....Thanks..rsbhunter