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Magpul MAG470-BLK STR Carbine Stock Black Synthetic for AR-15, M16, M4 with Mil-Spec Tube (Tube Not Included)
Made in the USA, the Magpul STR (Storage/Type Restricted) is a drop-in replacement buttstock for AR15/M4 carbines using mil-spec sized receiver extension tubes. A storage-capable version of the CTR, the STR has improved cheek weld and two water resistant battery tubes on a compact, reinforced polymer A-frame design.