An enhanced version of the Magpul CTRA(R) stock, the STR ("Storage/Type Restricted") buttstock features two 4A 1/4" 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 1A 1/4" sling loops and a socket for a pushbutton QD sling swivel on each side of the stock. 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 rub Mfg: Brownells SPECS: Reinforced nylon polymer, Black, Dark Earth, or O.D. Green. 7A 1/4" (18.4cm) OAL, 5A 1/4" (13.3cm) high. LOP adjustment range: 3A 1/4" (8.3cm). 12.5 oz (354g) wt.