Evolution Gun Works Star B Barrel Link Machined From Barstock /2 Links Chromo;y Steel. Normally barrels hit the back of the frame but the Star barrels fall short leaving the full force on the barrel link. This causes most of the factory links to snap under stress. EGW machined this link from 4140 to increase its durability under these conditions. Specifications for Evolution Gun Works Star B Barrel Link Machined From Barstock /2 Links: Manufacturer: Evolution Gun Works Color: Black Fabric/Material: Steel Package Contents: Evolution Gun Works Star B Barrel Link Machined From Barstock /2 Links Evolution Gun Works 20300: Star B Barrel Link Machined From Barstock /2 Links Chromo;y Steel