Precision machined from ordnance quality steel and meant to interface in close tolerance with the aluminum stock chassis. Some rocket surgeon drilled and tapped this in any other case-pristine stainless Mini-fourteen for an aftermarket scope mount. I used to be thrilled. I stuffed the holes with stubby minor Allen screws https://boats-for-sale-usa26924.blogzag.com/75751348/about-sage-ebr-sks-stock