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I am having a qty of short bbls machined to work with either the original rec or the new receivers I am making for the px90 project and want a little input on what twist rate would be preferable , 1/7 or 1/9
 

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I would buy a barrel like Esteves is talking about if you can keep close to the $300 range. Essentially, I want a 10.3 barrel with standard .5 x 28 threads with a perm attached suppressor shroud to keep the PS90 non SBR OAL. Shroud would need to accept standard 1.5 inch 5.56 suppressors. Is that possible?
 

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CMMGs 1:7 10" barrels are reportedly more accurate that FNs 1:9, supposedly for both subsonic and full velocity 195 / 197.

On that basis I'd say go 1:7
 

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Why not a 12 or 14 inch twist. I would think that with the lighter bullet a slower twist might help get that last extra bit of velocity.

Or are there really a lot of people that shoot heavy bullets out of their PS90's
 

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Richard, how are you doing on getting barrels made?

Did you deside on a twist?

Are you going with 18" for us in states that do not allow SBR?

Maybe in stainless steel?
 
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