ATI AK-47 Aluminum Upgrade Package: * Military type III anodized, 6061 T6 aluminum rails * 6-position commercial buffer tube * Buffer tube adapter * One 4" Picatinny rail * One 2" Picatinny rail with swivel stud * Two 2" Picatinny rails * Steel castle nut * Steel locking ring * Made in the USA * Limited lifetime warranty * Fits ATI"s AK-47 Strikeforce Stock & Handguards