The PTR91 KFM4 is a semi-automatic rifle chambered in .308 Win. or 7.62 NATO. PTR91 is the name of both the manufacturer and its product. The company says it wants to build a quality rifle based on Heckler and Koch’s G3 rifle because after H&K stopped production of the G3 poor imitations of it popped up all over. What PTR says they do differently from the rest is they use blueprints and parts that come directly from HK.

The PTR91 has a recoil-operated with a delayed roller-locking system. So after the firing pin strikes the primer gunpowder burns, gas expands and propels the round out of the chamber – just like any gun. As it pushes forward it also pushes back on the bolt causing felt recoil. On both sides of the firing pin are rollers that roll with the bolt as it is pushed back. The rear of the bolt will catch on the bot housing and, at this moment, the rifle ejects the spent casing. Also, at the rear of the bolt is a spring that compresses as the bolt is pushed back. Once the bolt catches, the spring reverses the force and sends it forward in turn chambering a fresh round. The rollers are supposed to help the bolt travel with greater speed.

Features include a rear sight that’s adjustable for windage and elevation and a fixed front sight. The KFM4 has an HK pre-ban style flash hider, which does as describe–hides the flash. Unlike other PTR91s, the KFM4 has an adjustable tactical stock. It is also available with a Picatinny rail for a hundred dollars more.

PTR91 Inc recommends its rifles for precision shooting, military and law enforcement use.

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