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Is there something different about this M4 tube?


Vertigofirearms

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Bubba strikes again.

 

Looks like a OEM 2 position tube. Note how there isn't the middle collapsible position or the secondary witness line. You can see where they machined positions 2 and 3 since the stainless receiver extension wasn't refinished.

 

Honestly, I can't see how it actually would function. They didn't machine the corresponding notch that indexes with the vertical pin that is next to the adjustment button on the collapsible stock. The only way it would appear to work is if the jackasses took that pin out and allowed it to be held in position by the adjustment button.

 

RecoilTube_zps1a87c856.jpg

Edited by StrangerDanger
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They didn't machine the corresponding notch that indexes with the vertical pin that is next to the adjustment button on the collapsible stock. The only way it would appear to work is if the jackasses took that pin out and allowed it to be held in position by the adjustment button.

 

The thing is, without that retaining pin the c-stock will NOT work, it will fully collapse on every shot.

Edited by Sukhoi_fan
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