the rifle prior to adoption. The rear sights were mounted to the dust cover and were aperture sights instead of the standard notch sight. SVDN (6V1N) – A series of variants of the original SVD which were issued with various night vision optics. V-70 – A prototype automatic rifle developed in 1968. It involved the development of a new bipod, a thicker and shorter barrel with a new muzzle device, and 15/20-round magazines. The detachable bipod designed for this project would be used in subsequent models of SVD. Tiger – A civilian variant of the SVD, lacking a bayonet lug, first produced in the 1970s. Serial production for began in 1992. For export into the United States, the sear which prevented out-of-battery discharge had to be removed to comply with the National Firearms Act. As of the writing of this article, Tiger rifles are available with shortened (520 mm) and full length (620 mm) barrels, different stocks (including an SVDS-style folding stock), and are chambered in 7.62×54mmR, .308 Winchester, .30-06 Springfield or 9.3×64mm Brenneke. AF – A prototype automatic rifle developed in the mid 70's. The prototypes were chambered in 5.45x39mm and made compatible with AK-74 magazines (specifically, the 45-round magazine also compatible with the RPK-74). SVD-S (6V3) – Attempts to reduce the length of the rifle for use by marines, mechanized infantry, and paratroopers began in 1978 by adding a folding buttstock and a separate pistol grip. Initially, preexisting stock designs were used (such as the one from the AKS-74), but ergonomic problems necessitated the design of a unique folding stock. The final design was chosen out of a variety of prototypes and adopted in 1995, which had a metal stock which folded to the right as to not be interfered by the optic mount and also had a shortened barrel. The stock included a rubber shoulder pad and cheek riser. The barrel was also given a heavier profile, the receiver housing was strengthened, the gas cylinder block was improved and a ported, and a shorter conical flash suppressor was adopted. The SVDSN (6V3N) variants, much like the SVDN variants, are simply equipped with various night vision devices. SVDG (6V1-10) – A smoothbore SVD with a 10mm bore developed alongside the modern intermediate cartridge program to use the experimental 3 mm APFSDS projectile, originally designed for use in standard machine guns. The design was not implemented due to the