The VST folding front sight and gas block is an all-steel, flip-up design, with spring loaded detents. There is no lock so if the sight gets hit, the sight will fold down rather than damage a locking mechanism. The VST-1 series incorporates a QD sling swivel cup mount while the VST-2 does not. All models use an AK47/AKM/AK74 front sight post. This allows the user adjust the sight, for elevation, with the use of a simple AK cleaning kit.