Echo Zulu Armorer's Wrench Stake your AR's castle nuts faster, safer, & more consistently with Tango Uniform's new Echo Zulu Castle Nut System. This patent pending Armorer's Wrench is precision machines from 4140 alloy steel and finished in long duration, diamond hard black nitride. This premium tool features a 1/2-inch square drive socket with the same center-to-center distance as a USGI castle nut wrench, so your favorite torque wrench will apply the proper 38-42 FT# when torquing down castle nuts. When combined with an Echo Zulu castle nut and a straight-wall spring loaded center punch (sold separately) this Armorer's wrench acts as a prec Mfg: Tango Uniform
