KNS Precision AR15/M16 .315 Diameter Pivot Pin w/Sling Stud Black. 315 Diameter Pivot Pin w/Sling Stud. These AR15 Lower Parts from the experts at KNS Precision eliminate all tension between your barrel and upper receiver when using a sling which increases your accuracy at the range or on the hunting grounds. This KNS Precision AR15/M16 .315 Diameter Pivot Pin w/Sling Stud is built tough for demanding use in the field and it's dressed with an oxide finish for enhanced resistance to corrosion and wear. Equip the KNS Precision AR15/M16 .315 Diameter Pivot Pin w/Sling Stud to your rifle for a reliable takedown or pivot point that will make your weapon easier and more streamlined for a variety of situations. Specifications for KNS Precision AR15/M16 .315 Diameter Pivot Pin w/Sling Stud: Manufacturer: KNS Precision Finish: Black Trigger Pin Size: 0.315 Color: Black Additional Features: w/Sling Stud Country of Origin: USA Package Contents: KNS Precision AR15/M16 .315 Diameter Pivot Pin w/Sling Stud KNS Precision PIVOTSTUD315: AR15/M16 .315 Diameter Pivot Pin w/Sling Stud Black