At FN Specialties, we offer a curated variety of FN-precise accessories that meet the very best specifications of high quality and overall performance. Improve your FN firearms with our expertly crafted accessories and knowledge improved performance and shooting precision. This is basically a clone of NcStar mount, done ideal. https://www.primmaryarmshop.com/product-tag/fn-510-accessories/?per_page=9&layout=list