The structure of PSG1 is similar with G3 rifle, but uses a thickened heavy barrel. The heavy barrel is mainly used to reduce barrel vibration during shooting to increase shooting accuracy. In addition, a low-noise forward assist similar to the M16 rifle is designed on the right side of the upper.
All of PSG1 rifles have no mechanical sights, but are equipped with dedicated scopes (VFC GBBR version uses MIL-STD-1913 rail), adjustable handgrips and buttstocks.