UTG 4th Gen FN/FAL Integral Picatinny Mount Replaces Dust Cover with Large Ejection Port for Optimum Performance One Piece Body Machined from Aircraft-grade Aluminum Alloy Superior Design with Integral Sliding Rail System for Quick and Friendly Installation Low Profile Top Picatinny Rail with 21 Slots Allowing Use of Iron Sights and Scope Applications Inch and Metric Compatible