Specs SPECIFICATIONS** CTR Carbine Stock, Mil-Spec ●Weight: 8.8 oz. ●Weight, w/receiver extension: 12.8 ●Length, max: 6.9 in. ●LOP Adjustment Range: 3.3 in. ●LOP, M4 Collapsed: ~10.5 in. ●LOP, M4 Extended: ~13.8 in. * Friction lock performance may vary depending on the host receiver extension's dimensional tolerances. ** Specifications based on standard-length (flat-back) M4 Carbine receiver extension and may vary depending on tube manufacturer.