QBZ-191's Bolt Carrier Group.

This means that the cam pin isn’t wearing the receiver like it does on an AR-15 (which is why the MCX has that replaceable track on the left side), which in turn will make the rifle last longer.

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Iirc the Remington model 8 uses a similar lever to lock the bolt in the unlocked position until it's ready to turn into the barrel extension, the m82 .50 cal rifle barrows this feature from the model 8, and I assume so does this rifle. The model 8 has a lot of features later guns copy, see the Kalashnikov safety/dust cover

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Ritterbruder2@reddit

I see, that makes sense. Is the cam pin really recognized as a weak point in the AR design?

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Q-Ball7@reddit

Yes. It's only an issue at very high round counts though.

Here's everything you'd want to know about the QBZ-191.

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PossiblyAKnob@reddit

This video explains the advantages of this type of setup.

https://www.youtube.com/watch?v=B3-vEiMeYlM

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Ritterbruder2@reddit

The Tavor 7 has something similar. It keeps the bolt in the forward (unlocked) position when out of the gun. That way, you don’t have to pull the bolt head out before reinstalling (like you do on an AR).

It’s just added soldier-proofing.

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littlelegsbabyman@reddit

Man. I wish experts or knowledgeable people got more upvotes. Since Reddit got popular it’s harder to find.

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Makky-Kat@reddit

Huh I learn something every day, although that seems like an excessive amount of soldier-proofing. (Granted, if you have an AR bolt in the wrong position you can’t get it very far before realizing you did something wrong.)

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Ritterbruder2@reddit

Alright, I had to do a bunch of weird shit to misassemble it.

The firing pin is spring loaded. The same spring pushes the bolt forward. I had to remove that spring.

I also had to take out the trigger pack. Otherwise the bolt lug will snag on the hammer.

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Ritterbruder2@reddit

On an AR, you realize something is wrong because the cam pin hits the receiver when you try to reinsert the bolt carrier.

The Tavor 7 is weird. It has a bolt that can be rotated 180° for either left-hand or right-hand eject. The cam pin is tucked away inside the bolt carrier. There wouldn’t be anything to tell you that something is wrong.

You could in theory depress this lever arm, collapse the bolt body, and misassemble the gun. But that lever takes a ton of pressure to depress. You’d have to really try to screw it up.

In fact I’m going to give this a try now and report back, lol.

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