Technically, the PSG-1 is no more than a heavily modified G3 rifle. It features the same roller-delayed blowback action, derived from earlier CETME 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 polygonal 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 buttstock 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 M16 rifles. 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 pushbutton, 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 G3 magazines or special 5-rounds magazines. There's no open (iron) sights on the PSG-1. Instead, it is fitted with the Hendsoldt 6X42 fixed power telescope sight with 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.
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