![]() 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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