FAB Defense GLR-16 CP Buttstock is a matte black polymer tactical buttstock for AR-15/M16/M4 platforms, with an adjustable cheek rest for optimal comfort and accuracy. Features a non-slip textured rubber buttpad for fast, stable shouldering with or without body armor, three integrated sling attachment slots (one front, two rear), and integrated ambidextrous QD swivel rear sling connectors. Includes a sealed, rattle-free storage compartment for two CR123 or AA batteries. Patented anti-rattle mechanism fits both Mil-Spec and Commercial aftermarket buffer tubes. OAL 7.08, height 5.23, width 2.59. Weighs 12.98 oz. Safety note Follow all manufacturer installation instructions. Verify proper function and secure mounting before use. Comply with local firearm laws and regulations.