Product Description The WMD Guns NiB-X Firing Pin is a 5.56 NATO replacement firing pin designed as a spare part for compatible bolt carrier groups. Featuring WMD&&';;s NiB-X (nickel boron) coating, it is built to support smooth operation and dependable function in demanding use. Keep one on hand as an essential maintenance and replacement component for your AR-15 platform. Product Highlights NiB-X (nickel boron) coated firing pin for enhanced lubricity and easy cleaning Designed for 5.56x45mm NATO applications Spare/replaceable component for compatible bolt carrier groups (BCG) Ideal maintenance part to keep your AR-15 running reliably Genuine WMD Guns part matched to manufacturer specifications Specs Brand: WMD Guns Product Type: Firing Pin (BCG spare/replacement part) Caliber Compatibility: 5.56x45mm NATO Platform Compatibility: AR-15 Coating/Finish: NiB-X (Nickel Boron) Manufacturer Part Number: 1-NIBXFP UPC: 855899003171 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.