S-Gun™ MIG Guns | Neck Options Configure your curved or straight handle S-Gun™ semi-automatic air-cooled MIG gun with your choice of a fixed or rotatable neck. Find your handle type below for available neck options and part numbers. O Series Curved Handle Fixed Necks Configurator OptionAngleLengthPart NumberO45ShortQT2-45P60ShortQT2-60R45MediumQT3-45S60MediumQT3-60U45LongQT5-45V60LongQT5-60 Rotatable Necks Configurator OptionAngleLengthPart NumberB45ShortQT2-45C60ShortQT2-60E45MediumQT3-45F60MediumQT3-60H45LongQT5-45I60LongQT5-60 O Series Small Curved Handle Fixed Necks Configurator OptionAngleLengthPart NumberO45ShortQT2-45P60ShortQT2-60R45MediumQT3-45S60MediumQT3-60U45LongQT5-45V60LongQT5-60 Rotatable Necks Configurator OptionAngleLengthPart NumberB45ShortQT2-45C60ShortQT2-60E45MediumQT3-45F60MediumQT3-60H45LongQT5-45I60LongQT5-60 T Series Straight Handle Fixed Necks Configurator OptionAngleLengthPart NumberO45Short305-45P60Short305-60R45Medium405-45S60Medium405-60U45Long505-45V60Long505-60 Rotatable Necks Configurator OptionAngleLengthPart NumberB45ShortQT2-45C60ShortQT2-60E45MediumQT3-45F60MediumQT3-60H45LongQT5-45I60LongQT5-60