Guntec USA AR 9mm Multi Caliber Collapsible Stock w/Adjustable Cheek Riser Black. The goal is to distribute excellent quality at an economical value. Specifications for Guntec USA AR 9mm Multi Caliber Collapsible Stock w/Adjustable Cheek Riser: Manufacturer: Guntec USA Color: Black Gun Model: AR-9 Stock/Brace Material: Polymer Gun Type: Rifle Hand: Ambidextrous Caliber: 9mm Luger Finish: Matte Fabric/Material: Polymer Features of Guntec USA AR 9mm Multi Caliber Collapsible Stock w/Adjustable Cheek Riser 9mm caliber Version. Multiple cutouts to reduce weight. Cheek riser has multi point locking system. New heavy duty design. Neoprene rubber buttpad included. Accepts QD Sling swivel on Left or Right side. Complete with Buffer Tube End Plate Castle Nut 9mm CAR Buffer & Chrome Recoil Spring. Adjustable Cheek riser with 6 different heights. QD swivel included. Package Contents: Guntec USA AR 9mm Multi Caliber Collapsible Stock w/Adjustable Cheek Riser What firearm models does the manufacturer say Guntec USA AR 9mm Multi Caliber Collapsible Stock w/Adjustable Cheek Riser is compatible with? The manufacturer says that Guntec USA AR 9mm Multi Caliber Collapsible Stock w/Adjustable Cheek Riser is compatible with AR-9Guntec USA MCS-R-9: AR 9mm Multi Caliber Collapsible Stock w/Adjustable Cheek Riser Black