ALG Defense Forged Sling Swivel Quick Draw Black. The standard QD configuration makes it compatible with any device that accepts QD accessories. The FSS weighs in at roughly 0.5 ounces and is about half the weight of similar steel QD sling swivel assemblies. The FSS is forged from 7075 T6 aluminum which is the same aluminum and manufacturing process used to make mil-spec upper and lower receivers. This process allows the FSS to be very strong and can withstand pull forces of up to 800lbs. Specifications for ALG Defense Forged QD Sling Swivel: Manufacturer: ALG Defense Condition: New Package Contents: ALG Defense Forged QD Sling Swivel ALG Defense 05-224B: Forged Sling Swivel Quick Draw Black