Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
2/12/2020 1:49:49 AM EDT
Steve,
I'm contemplating shortening my 9" PDS barrel to 8.5".  Do you know if the gas port size changed when RRA went from 8.5" to 9"?  If so, can you tell me what size the 8.5" had?

Also, any chance you guys have an old 8.5" barrel laying around you'd be willing to sell?  (would save me the hassle!)
2/12/2020 4:36:17 PM EDT
[#1]
We started at just over  8" and then went to 9".  Both 1:9 twist.  I don't show an 8.5" anywhere along the line.  
I don't believe the gas port changed when we increased the length, and if I remember correctly, the additional inch was all added forward of the gas port.
Steve/RRA
2/12/2020 5:02:46 PM EDT
[#2]
Yep that's what I meant, 8".

So safe to say if I leave the gas port as is it should be fine?
2/13/2020 10:34:53 AM EDT
[#3]
I don't think that there will be any gas related problems.  You may have an issue with some muzzle devices, and will lose some velocity and energy.
Steve
2/13/2020 10:42:11 AM EDT
[#4]
Thanks Steve.  Yep already checked clearances on my muzzle device, looks like it won't be an issue.

Any chance you guys have old 8" barrels laying around?
2/13/2020 5:03:35 PM EDT
[#5]
Quote History
Originally Posted By 60-Driver:
Thanks Steve.  Yep already checked clearances on my muzzle device, looks like it won't be an issue.

Any chance you guys have old 8" barrels laying around?
View Quote
Sorta...I Have some 8" chrome-lined barrels in a really fast twist rate  that are over runs form a contract.
E-mail me ([email protected]) isf interested.
Steve/RRA
2/13/2020 7:01:02 PM EDT
[#6]
Email sent.

While on the topic, can you tell me what the port size is/was for the 300BLK version of the PDS?

Sign up to continue the discussion

Create a free account to share your thoughts, follow topics, and connect with the AR15.COM community.

Already a member? Sign In