Leapers UTG 590M Mag-Fed Optic Mount 12 Gauge Black. 5" Chambering 6061-T6 Aluminum Construction Finished in a Matte Black Anodization Removable 4-Capacity Shot Shell Carrier Included Full Length Picatinny Top Rail for Ample Optic Real Estate No Permanent Modifcation Required Specifications for Leapers UTG Picatinny Rail Scope Mount: Manufacturer: UTG Pro Color: Black Finish: Anodized Fabric/Material: 6061-T6 Aluminum Base/Mount Type: Scope Mount Hand: Ambidextrous Package Contents: Leapers UTG Picatinny Rail Scope Mount Leapers MT-MB590M: UTG 590M Mag-Fed Optic Mount 12 Gauge