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With some recent topics on op rod length I decided to measure a few things regarding the CSS puc. Here is what is confusing the crap out of me. I took out my gas plug and noticed the CSS puc is just short of the gas holes. I then removed it and put my factory plug in and it sat further back. I then took them both out and measured them. The CSS puck is shorter in overall length! How the hell is that possible?

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With some recent topics on op rod length I decided to measure a few things regarding the CSS puc. Here is what is confusing the crap out of me. I took out my gas plug and noticed the CSS puc is just short of the gas holes. I then removed it and put my factory plug in and it sat further back. I then took them both out and measured them. The CSS puck is shorter in overall length! How the hell is that possible?

 

 

Interesting isn't it. I machined one for my s12 and it's actualy .042" longer than the orginal russian puck, bu the groves are the same dimesions apart as well as depth and width. And seems to have no change in performance. ( Only made the puck to replace on russian part) The gun always worked fine.

My question to you, is does your gun suffer from this diffrence? If not who cares.

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No just want to know

With the tail it is longer than the factory puc. The body without the tail is shorter to give the puc a longer stroke to keep contact with the op rod longer yet the tail keeps it as far forward as possible when the bolt is closed to decrease the volume of gas needed to push the carrier back.

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