The Midwest Industries Picatinny Top Rail Gas Tube is the perfect addition to your AK-47 or AK-74. The tube is constructed of durable 6061 aluminum and fits AK's with gas tubes approximately 6.75" long. The integral picatinny top rail provides lower 1/3 co-witness when used with Aimpoint Micro style red dot sights and the entire tube is held firmly in place with Midwest Industry's rock solid mounting feature. FeaturesProvides lower 1/3 co-witness with Aimpoint micro style red dot sightsEasy installation with no permanent modification to the firearmRock solid mounting feature eliminates movement of the gas tubeInternal profile of the tube is the same a standard AK gas tube