Dead Foot Arms T-REX 5 Position Collapsible AR Stock Black Anodized. Designed for use with the DFA MCS System or other rifle platforms that do not use a buffer/buffer spring assembly. Specifications for Dead Foot Arms T-REX 5 Position Collapsible AR Stock: Manufacturer: Dead Foot Arms Color: Black Anodized Gun Model: AR-15 Gun Type: Rifle Weight: 1.15 lb Condition: New Country of Origin: USA Features of Dead Foot Arms T-REX 5 Position Collapsible AR Stock: Type III Anodized 7075 Aluminum made in specialized factories 7.2 oz Package Contents: Dead Foot Arms T-REX 5 Position Collapsible AR Stock What firearm models does the manufacturer say Dead Foot Arms T-REX 5 Position Collapsible AR Stock is compatible with? The manufacturer says that Dead Foot Arms T-REX 5 Position Collapsible AR Stock is compatible with AR-15Dead Foot Arms 78770: T-REX 5 Position Collapsible AR Stock Black Anodized