Fits Romanian, Bulgarian, Chinese and US AKs and Variants, Including Models with Oversized Barrel/Rear Sight Block. Rugged Aircraft Aluminum Alloy Construction with Precision CNC Machining. Four Mil-spec Picatinny Rails with Integrated QD Swivel Housings on Left/Right Rails for Versatile Accessory Applications. Simple and Friendly Installation, No Gunsmith or Tool Required. Solid Locking Features for Most Secure Fit. Ultimate Tactical Solution to Enhance Accuracy Under Toughest Environments. Hardcoat Anodized Finish for Wear Resistance. Proudly Made in USA with Superb Design and Production. Black Rubber Rail Guards Included