The Advanced Technology Int. 15" Slim AR-15 Free-Float Forend Package fits AR-15 variants. Does Not fit AR-10 or .308 Variants. Made with military type III anodized, 6061 T6 aluminum and is ultra-light and virtually indestructible. It has a seamless intergraded top rail and M-LOK mounting locations on 3 sides for rails or compatible accessories. Made in the USA.