M2 Armament Group AR-15 Sopmod Style Stock Black. Engineered for tactical operators precision carbine shooters and hard-use AR builders the SOPMOD profile dramatically improves cheek weld contact optics alignment and rifle recoil management over basic USGI M4 stocks. Specifications for M2 Armament Group AR-15 Sopmod Style Stock: Manufacturer: M2 Armament Group Color: Black Gun Model: AR-15 Stock/Brace Material: Polymer Gun Type: Carbine Weight: 11.8 oz Length: 7.43 in Max Width: 2.4 in Package Contents: M2 Armament Group AR-15 Sopmod Style Stock What firearm models does the manufacturer say M2 Armament Group AR-15 Sopmod Style Stock is compatible with? The manufacturer suggests that M2 Armament Group AR-15 Sopmod Style Stock is compatible with AR-15M2 Armament Group LP-Stock-Sopmod: AR-15 Sopmod Style Stock Black