Our extra-low profile QD push button sling swivel picatinny rail adapter fitting flush to the picatinny rail is the lowest profile adapter ever designed for the MIL-STD-1913 rails. Made of solid steel, its unique locking bar design system allows for it to be light weight and durable while remaining flush to the slots of the rail system. Since the adapter sits in between the rails, it will not interfere with your sights and fit neatly under any accessory including optics where ever it is mounted. The dual sided attachment points allows the user to choose which side they would like to mount their sling swivel.