The Advanced Technology Int. Strike force AK-47 Package fits most stamped receivers but will not fit milled receivers. It is an Adjustable Side-Folding Strike force Stock with Scorpion recoil system"" ventilated handguards"" pistol grip and adjustable cheek rest. It is a 6-position adjustable side-folding stock and can be fired from a folded position. The TracLock System eliminates horizontal and vertical movement of the stock on the buffer tube. The Scorpion Razorback Recoil pad is non-slip and removable and the Scorpion Recoil Pistol Grip is ergonomic with a Sure-Grip texture. There is a removable/adjustable tactical cheek rest that is elongated and designed to fit all users. The included short cheek rest has 1/2"" of adjustment. There are four Picatinny Rail locations: One 4"" Picatinny Rail"" Two 2"" Picatinny Rails and One 2"" Picatinny Rail with swivel stud and blank inserts for when rails are not in use. Manufactured in the USA.