Fusion 6inch - length recoil spring end cap. … Standard flange end cap with Flat plain front, .090 end cap catch boss to match-up with our Standard flange bushings. NO MiM, All made from solid Stainless Steel bar-stock and CNC machined. Bright Finish. These new solid end caps are made with an extended Counter-bore so that standard 5 inch recoil springs can be used in the 6 inch slides and long slide pistols. Top Quality professional Gunsmithing part, Made in the USA.