USGI Military surplus M4 Enhanced SOPMOD Stock, currently employed by the U.S. military, reinforced polymer stock fits M4-type receiver extensions, improved cheekweld designed for increased comfort and consistency. Two waterproof storage compartments running the length of the stock hold 2 AA or 3 CR-123 batteries. Streamlined contours resist snagging on clothing, equipment, or vegetation to aid in safe and stealthy operation. Sure-Grip stock latch ensures convenient and intuitive length-of-pull adjustment, anti-slip rubber recoil pad secures the weapon to the shoulder. - None of my parts that I list as USGI early Vietnam Era Military surplus or USGI Military surplus are reproductions all where purchased prior to the era when reproduction parts where being made (20-40 years ago)