Pro Mag Archangel 6 Position Collapsible Buttstock For AR15 CarbinesCommercial Tube Black Polymer. Featuring ambidextrous QD sling-swivel inserts at the front and rear of the buttstock plus a slot for attaching a web-sling the Archangel adjustable butt-stock allows multiple configurations for the convenience of the user. Specifications for Pro Mag Archangel 6 Pos Collapsible AR15 Buttstock Commercial: Manufacturer: ProMag Color: Black Gun Model: AR-15 Stock/Brace Material: Polymer Gun Type: Rifle Buffer Tube Size: Commercial Fabric/Material: Polymer Package Contents: Pro Mag Archangel 6 Pos Collapsible AR15 Buttstock Commercial What firearm models does the manufacturer say Pro Mag Archangel 6 Pos Collapsible AR15 Buttstock Commercial is compatible with? The manufacturer says that Pro Mag Archangel 6 Pos Collapsible AR15 Buttstock Commercial is compatible with AR-15Pro Mag AA120: Archangel 6 Position Collapsible Buttstock For AR15 CarbinesCommercial TubeBlack Polymer