VANTAC - Industry leader in "HASTY STOCK ADJUSTMENT". The Vantac Tech technology is simple, instantaneous Length of Pull (LOP) adjustment while maintaining both hands on the weapon, cheek weld and sight alignment. The D.A.D.S. (Direct Access Defense System) is our first product displaying the technology. A buffer tube with internal parts allowing stock adjustment at the push of a button. This keeps the shooter in lethal control of the weapon and able to fire accurately even during stock adjustment, while only adding 1.1 oz. to the weapon. "Nothing's More Invincible Than Our DADS" (less)