B5 Systems Modular Platform Stock Od Green. Attaches via 1913 Picatinny mount. Constructed of durable composite materials and steel hardware. Specifications for B5 Systems Modular Platform Stock: Manufacturer: B5 Systems Gun Type: Rifle Gun Make: AR Platform Gun Model: AR-15 Features Of B5 Systems Modular Platform Stock Collapsible Length Of Pull Adjustment Adjustable Spring Assist Cheek Riser Cushioned Nonslip Buttpad Fixed Sling Mounts And Steel Anti-Rotational Qd Mounts Durable Composite Materials Color Matched Steel Hardware Attaches Via 1913 Picatinny Mount Package Contents: B5 Systems Modular Platform Stock What firearm models does the manufacturer say B5 Systems Modular Platform Stock is compatible with? The manufacturer says that B5 Systems Modular Platform Stock is compatible with AR-15B5 Systems MPS-1556: Modular Platform Stock Od Green