ATI is constantly combining the latest cutting-edge technology and innovative design with premium materials. ATI's main goal is to achieve the highest quality buttstocks and accessories in the industry. With this goal, Advanced Technology International is the premier manufacturer of leading-edge buttstocks and synthetic and aluminum accessories for a wide variety of firearms. ATI is constantly pushing today's science in an effort to apply the latest advancements to your products. Features: Strengthen the connection of the mag extension to the barrel May also be used to mount 1 inches diameter light or laser to barrel Includes sling swivel stud Swivel stud is reversible for right or left-handed shooters Easy installation DuPont extreme temperature glass reinforced polymer Manufactured in USA Limited lifetime warranty