An enhanced version of the Magpul CTR stock, the STR ("Storage/Type Restricted") buttstock features two 4¼" left- and right-side positioned battery storage tubes and a wider cheekweld for extra comfort. Rubber caps at the rear keep the storage compartments resistant to water incursion, yet pop off easily for access to two AA or two CR-123 batteries inside. Features two integral 1¼" sling loops. Includes reversible QD swivel socket. Friction locking mechanism minimizes wobble between the buffer tube and the buttstock for a solid, secure "feel", which is enhanced by the detachable .30" thick rubber rubber that adds plent Mfg: Magpul SPECS: Reinforced nylon polymer, Black, Dark Earth, or O.D. Green. 7¼" (18.4cm) OAL, 5¼" (13.3cm) high. LOP adjustment range: 3¼" (8.3cm). 12.5 oz (354g) wt. Mil-Spec Fits mil-spec 1.14" O.D. carbine buffer tubes.