Bossweld Spool Gun 3Mt suits Bossweld Mig 186This spool gun is the perfect solution for welding soft alloys, especially aluminium where feeding the aluminium MIG wire is always a challenge due to birds nesting, tangles and feedability problems. A spool gun overcomes these issues by providing a reliable solution that delivers the wire at the gun point with a short feed length compared to a standard mig gun length of at least 3 metres.