KNS Precision AR-15 Bolt Catch Retaining Pin Features The KNS Precision Bolt Catch Retaining Pin is machined from steel and finished with a durable black nitride coating that resists wear and corrosion through repeated use. Sized to fit the AR15 and M16 platform it secures the bolt catch assembly so the rifle locks the bolt back reliably on an empty magazine. Because it is a precision replacement part it restores proper function to a rifle whose original pin has been lost bent or worn from heavy use. Its compact dimensions of roughly 3 by 2 by 0.5 inches make it easy to carry as a spare in a range bag or armorer s kit. KNS Precision includes three C-clips along with the retaining pin itself giving builders enough spare hardware to complete an installation or keep extras on hand for future builds. Having the clips and pin bundled together saves a trip back to the parts bin mid build which matters when working through a full AR assembly. At a mere 0.01 lbs this small part adds virtually no weight or bulk to a parts inventory while remaining an important piece of the bolt catch system. For AR15 and M16 owners and armorers who need a dependable factory style retaining pin the KNS Precision part is available for sale at GrabAGun. KNS Precision AR-15 Bolt Catch Retaining Pin Specifications Manufacturer: KNS Precision Model: AR-15 Bolt Catch Retaining Pin Material: Steel Finish: Black Nitride Compatible Hosts: AR-15 M16 Includes: 3 C-Clips 1 Bolt Catch Retaining Pin Weight: 0.01 lbs Available At: GrabAGun