The PSG-1 is mechanically based on the G3 rifle and features a low-noise bolt closing device (similar to the forward assist on the M16A1/A2/A3/A4). Its expected accuracy is below 1 minute of arc (MOA) and it is considered to be one of the most accurate semi-automatic sniper rifles, capable of putting 50 rounds of match ammunition inside an 80 mm circle at 300 meters. (3.14" at 273m).

All PSG-1s are free of iron sights but come mounted with the Hensoldt 6x42 scope with illuminated reticule, a heavy free-floating barrel and adjustable stock. The PSG-1 stock is of high impact plastic, matte black in color can be adjusted in all directions to perfectly fit anybody using it. It is adjustable for length, pivoting butt cap and includes a vertically-adjustable cheekpiece. The forend is fitted with a T-way rail for sling swivel or tripod.

The rifle also features a removable and adjustable trigger unit, for further individual fitting of the rifle. The trigger is adjustable for pull and is removable from pistol grip. The pistol grip is of a target-type with an adjustable palm shelf.

Another unique characteristic of the PSG-1 is, after firing, the bullet casing is ejected with substantial force, reportedly enough to throw it approximately 10 metres sideways. While this is generally not an issue for law enforcement snipers, it greatly compromises the military use of the rifle, because it would easily give away the sniper's position. The brass is also difficult to find for clearing the area of usage marks

Heckler & Koch PSG-1

 
PSG-1
Type     sniper rifle
Place of origin     Germany
Used by     Germany, Indonesia, Malaysia, United Kingdom, United States and other military and police forces.
Designed     1970s
Manufacturer     Heckler & Koch
Specifications
Weight     8.10 kg (17.81 lbs) Length 1200 mm (47.6 in) Barrel length 650 mm (25.6 in) 4 grooves, right hand twist.
Cartridge     7.62 x 51 mm NATO
Action     Roller-delayed blowback
Muzzle velocity     868 m/s (2,850 ft/s)
Effective range     1000 m (1094 yd)
Feed system     5 or 20-round detachable box magazine
Sights     Hendsoldt 6 x 42 mm Telescopic sight

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