This guide details the unique silent bolt closure mechanism on the Danish m/66 Sniper rifle, a variant of the Heckler & Koch G3. The video, presented by Ian McCollum, highlights how 'thumbprint' serrations on the bolt carrier allow for manual, silent manipulation of the bolt into battery. This technique was crucial for maintaining stealth in a sniper role. The m/66 also features a Hensoldt 4x24 scope with a BDC dial and a distinctive iron sight tunnel.
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