The Leapers UTG PRO AK47 Tactical QD Low-Profile Rail System fits with Romanian, Chinese, and U.S. AKs. The Leapers UTG PRO AK47 Low-Profile Rail System also fits Saigas with Rear-Sight Blade and Fixed Buttstock. And with an innovative three-point Modular and Adjustable Locking System for optimal low profile and secure fit, the Leapers UTG PRO Rail System features an Integrated Backup Rear Iron Sight with Precision Windage Adjustment. The Leapers UTG PRO Tactical QD Rail System also supplies an easy and Friendly Mounting Operation, which secures the Rear Sight Blade and Buttstock for rock-solid installation. The Leapers UTG PRO Low-Profile Rail's quick-detachable, flip open design is convenient for gun cleaning and offers zero retention. The Leapers UTG PRO Rail System also has 19 rail slots for flexible use of scope, dot spot, Magnifier and other accessories; along with Matte Black Anodizing ensuring best wear resistance and long-term durability. The Leapers UTG PRO AK47 Tactical Rail System does not work with a milled receiver AK47 with slanted tang.