HKPRO Forums banner

metric threads

  1. Barrel nut thread specifications HK416/MR556/MR223 and HK417/MR762/MR308

    HK REFERENCE LIBRARY
    Hello, can anyone help me identifying the thread type used in HK416/MR556/MR223 barrel nuts? In another forum thread I read that the HK416 uses metric threads with a 1.5 mm pitch, but the diameter was not specified. Since the AR-15 uses 1.250"-18 TPI (which equals M31.75 x 16.93 mm in metric...
Top