The C91 is a 9½-pound rifle with an 18½-inch barrel chambered for the 7.62 NATO or. The Century International Arms C308 is a combination of surplus and new parts. Some of these clones use surplus military parts from nations that once used the HK 91. With the high price of the original HK 91 moving it out of the reach of many of us, there have been a number of attempts to produce a clone of it. This occurs much faster than I can describe here. The spent case is ejected during the bolt’s travel, and the new cartridge is fed into the chamber. Once the bullet exits the barrel and pressure subsides, the bolt unlocks and operates in the normal fashion, moving to the rear under spring pressure, then traveling forward to strip a round from the magazine. When the rifle fires, the bolt is held steady by the force of the bolt on the roller cams. Rather than using gas operation or a recoiling barrel, the HK 91-type rifle operates by use of cams on the bolt that run into a trunnion inside of the receiver. The rifle operates by use of a roller-cam mechanism. The Century C308 rifle is an attractive and functional clone of the HK91 rifle. The G3/HK 91 has served long and well and achieved recognition as both an accurate and reliable firearm. The rifles also become known commercially as the Heckler & Koch HK 91. The rifle was adopted by a re-arming Germany as its G3. The successful CETME served in a time when the M14 and FN FAL were in wide use. The CETME ( Centro de Estudios Técnicos de Materiales Especiales) was first adopted in Spain. German engineers’ epic escape from Nazi Germany (just ahead of the Russians) and refuge in Spain led to the CETME rifle. The history of the roller cam-operated rifle, from the CETME to the HK91, is a thrice-told tale.
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