Product Description Battle Steel AR15/M4 Mil-Spec Spring Kit. Original OEM & US Government Manufacturer. 100% MADE IN USA US Government Part Number & Description 8448504 Battle Steel Firing Pin Retaining Pin 12/Pack at BOTACH Browse all BOTACH deals $4.98 In Stock at BOTACH Price checked 6 days ago Buy Now at BOTACH Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Battle Steel Battle Steel