Does FX smooth twist barrel (X or non X) have rifling inside the barrel?

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flyingtiger

Member
Feb 17, 2018
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North Carolina
like this one?


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I am asking this question, because I saw from youtube that the rifling is OUTSIDE in the barrel:) 

why FX said it's cost effective to make it? 
 
I would imagine that pressing in the rifling from outside is not only much quicker but also avoids the need for expensive machining/ drilling bits that need periodic replacement due to becoming dull. I would also imagine that it is cost effective due to less material being required to make the thin barrel liners. The actual process and machine is a trade secret.
 
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"Grin_Reaver"I would imagine that pressing in the rifling from outside is not only much quicker but also avoids the need for expensive machining/ drilling bits that need periodic replacement due to becoming dull. I would also imagine that it is cost effective due to less material being required to make the thin barrel liners. The actual process and machine is a trade secret.
Click to expand...
If I had to guess I think their secret process is just sending a heated tube through a die that rotates at a slow varying speed
. 
 
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"Grin_Reaver"I would imagine that pressing in the rifling from outside is not only much quicker but also avoids the need for expensive machining/ drilling bits that need periodic replacement due to becoming dull. I would also imagine that it is cost effective due to less material being required to make the thin barrel liners. The actual process and machine is a trade secret.
Click to expand...

if a barrel can be pressed to create rifling from outside, then the material of the barrel should be very soft. Can a soft barrel last as long as traditional barrel?

Can you show me a picture of inside the smooth twist barrel?

Why firearm industry didn't do it that way? is it because airgun pellet is very soft? 
 
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