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  1. Some years ago I was goofing around with a tavor: And a somewhat... less practical design as well: Upon field stripping them, I noticed something interesting: The desert eagle's bolt is on the left, and the tavor's is on the right. They're surprisingly similar. The cam surface for the bolt rotation is located on the bolt stem. In most other rotating bolt designs the cam surfaces are located on the bolt carrier, not the bolt. This is the TAR-21 bolt carrier: You can see the hole where the cam pin sits (it's the big one you can see the wood grain through). In most designs, like the AR-15, the cam pin is attached to the bolt and translates past the bolt carrier. In the tavor it's the other way around. Some older designs like the Lewis and its many progeny also work like this, but ever since the M1 garand the fashion has been to place the lug on the bolt and the cam on the carrier. As you can see, the desert eagle works exactly the same way: The cam pin is removed, and you can see the slot it sits in as well as the bolt cam surfaces just showing through. The similarities do not end there: In the above image you can see the bolt carrier group as it is removed from the stock for field stripping. The rod under the return spring is a guide rod that prevents the bolt from rotating during feeding: Once the bolt carrier runs all the way forward it overruns this rod, which allows the bolt to rotate: In an AR-15 the bolt is kept from prematurely rotating by having the cam pin drag against the upper left inner side of the receiver. The tavor must have this system with the guide rod because the cam pin is stationary with respect to the bolt carrier. The desert eagle bolt is held forward in a very similar manner: Rather curious, no?
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