The PSG-1 sniper system (PrazisionsSchutzenGewehr, or "high-precision marksman's rifle"in English) had been developed by the German company Heckler - Koch by themid-1980s as an ultimate police and counter-terror weapon. Some German elite law-enforcement groups, like GSG or KSK-9, participate in this development, and since its introduction the PSG-1 had been adopted by various police forces in Europe and Americas. It is way too heavy and somewhat too gentle for military use, so it never seen any military use.
Caliber: 7.62 x 51mm NATO (.308 Win)
Action: Semi-automatic, roller-delayed blow back
Barrel: 650 mm
Overall length: 1208 mm
Weight: 8.10 kg with scope and no magazine
Magazine: 5 or 20 round detachable box
Scope: Hand soldt 6x42, 6 settings from 100 to 600 meters
Expected accuracy: Sub-1MOA with match grade ammunition
Technically, the PSG-1 is no more than a heavily modified G3 rifle. It features the same roller-delayed blow back action, derived from earlier C E T M E rifles, and the same stamped steel receiver with separate detachable trigger unit. The heavy barrel is precisely made by the cold hammer forging process with poly go rifling for improved accuracy and longer life. Special trigger unit features a semi -automatic only hammer group and the adjustable trigger with trigger pull of about 1.5 kg (3 lbs). The ergonomically shaped pistol grip features an adjustable palm stop. Plastic but stock is also adjustable for height and for length of pull. Another non-typical feature of the PSG-1 is the "silent bolt closing device", actually similar to the forward assist, found on M16rifles.
This is apparently to be used in situations where a complete silence must be maintained until the shot is fired. The devise is no more that a push button, located just behind the ejection port, and linked to the bolt carrier by the ratchet-like device. The rifle is fed using standard 20-rounds G3magazines or special 5-rounds magazines. There's no open (iron) sights on the PSG-1. Instead, it is fitted with the Hand sold 6X42 fixed power telescope sigh illuminated reticle. The scope has built-in range adjuster that works in ranges from 100 to 60 meters, so 600 meters is considered the maximum effective range. Most strangely, the PSG-1 had no integral bipod. Instead, it is often used with the separate rest, mounted on the compact tripod.
Asian Defence News