Sionics Extreme Reduced Gas Port Barrel, Range Report

[Pappabear]

As many of you know, Sionics is now making a True suppressor ready barrel. Mark did a measurement of the port and it looks to be in the 062 range. I have two SBR's and ran them side by side. Both have A5 and LMT enhanced carriers. Both have Vltor monolithic uppers and AAC M4-2K cans. The first runs with the original 11.5 RGP barrel by Sionics, it runs very well and throws the brass slightly forward in the 2-2:30 range. A little hot as one would expect with the AAC can and all. Runs 100% flawless, no complaints.

Gun two with ERGP Sionics barrel and it ran as would be expected, a little smoother. Tossing brass in the 3-3:30 range and a bit softer. I was most impressed with this barrel. It is not supposed to run ammo without a can but we were able to run Blackhills and "Mark-hills" loads getting lock-back some of the time but not all the time. Also, the gun was cleaned and freshly greased. Which tells me this barrel is ported perfectly to run a can. I don't want a barrel that runs so soft it becomes unreliable at anytime under any condition. I was a bit worried it would shoot great at the expense of reliability, not going to be the case.

If you are going too run your SBR suppressed, and you want a 11.5 barrel, this is one great option. I honestly wished my other 11.5 was the newer barrel. I don't think I would call it Extreme RGP barrel, I would call it the perfect GP barrel. Its ideal not extreme.

We were busy running a new load of 178 ELD's for the LMT MWS, so we didn't give it as much time as we will next week, running more types of ammo and maybe some lowers without A5 and enhanced carriers. More data to follow, and any request let us know. Also, we will do some accuracy testing for shits and giggles. Even thought I think 2 to 3 MOA is fine for a 11.5 SBR, I always like better.

Again, more data to follow.

PB

[opngrnd]

I'd love to see how it shoots the Markm house loads. I've come to use them as a metric of performance for almost any 223/5.56 rifle I try. I even keep a spare bag of the 69gr loads in my range bag in case a buddy is having trouble and wants me to shoot good ammo through his rifle.

[Pappabear]

I'd love to see how it shoots the Markm house loads. I've come to use them as a metric of performance for almost any 223/5.56 rifle I try. I even keep a spare bag of the 69gr loads in my range bag in case a buddy is having trouble and wants me to shoot good ammo through his rifle.

That was the "Mark hills" load in jest. But we didn't test accuracy. Next week.

PB

[308sako]

Very much appreciate the report on these barrels as I am about to "pull the trigger" on one.

Curious as to what sort of accuracy potential you think it has and what type of sight(s) are you running on it.

[snackgunner]

So they have 2 different barrels now. A rgp and a ergp barrel?

[Steve-0-]

So they have 2 different barrels now. A rgp and a ergp barrel?

Yes, The original RGP was meant for optimal suppressed use but could cycle un-suppresed if needed at the request of Peoria PD for worst case scenarios. We have now publically released a true suppressor only barrel. It may lock back with certain loads but by all means is not meant to EVER be run without a can,

[Steve-0-]

As many of you know, Sionics is now making a True suppressor ready barrel. Mark did a measurement of the port and it looks to be in the 062 range. I have two SBR's and ran them side by side. Both have A5 and LMT enhanced carriers. Both have Vltor monolithic uppers and AAC M4-2K cans. The first runs with the original 11.5 RGP barrel by Sionics, it runs very well and throws the brass slightly forward in the 2-2:30 range. A little hot as one would expect with the AAC can and all. Runs 100% flawless, no complaints.

Gun two with ERGP Sionics barrel and it ran as would be expected, a little smoother. Tossing brass in the 3-3:30 range and a bit softer. I was most impressed with this barrel. It is not supposed to run ammo without a can but we were able to run Blackhills and "Mark-hills" loads getting lock-back some of the time but not all the time. Also, the gun was cleaned and freshly greased. Which tells me this barrel is ported perfectly to run a can. I don't want a barrel that runs so soft it becomes unreliable at anytime under any condition. I was a bit worried it would shoot great at the expense of reliability, not going to be the case.

If you are going too run your SBR suppressed, and you want a 11.5 barrel, this is one great option. I honestly wished my other 11.5 was the newer barrel. I don't think I would call it Extreme RGP barrel, I would call it the perfect GP barrel. Its ideal not extreme.

We were busy running a new load of 178 ELD's for the LMT MWS, so we didn't give it as much time as we will next week, running more types of ammo and maybe some lowers without A5 and enhanced carriers. More data to follow, and any request let us know. Also, we will do some accuracy testing for shits and giggles. Even thought I think 2 to 3 MOA is fine for a 11.5 SBR, I always like better.

Again, more data to follow.

PB

Thanks for the write-up PB. Were gonna definitely produce more of these.

[snackgunner]

Yes, The original RGP was meant for optimal suppressed use but could cycle un-suppresed if needed at the request of Peoria PD for worst case scenarios. We have now publically released a true suppressor only barrel. It may lock back with certain loads but by all means is not meant to EVER be run without a can,

So whats the benefit of the ergp barrel over the rgp barrel? Does it run "better" suppressed?

[markm]

So whats the benefit of the ergp barrel over the rgp barrel? Does it run "better" suppressed?

In my opinion, the RGP is gassed just right for NO suppressor. The ERGP is gassed perfectly for dedicated suppression. It will barely run with no can.

[markm]

In my haste to get the barrel installed I didn't measure the port accurately. I have a large needle that I stick in the port and then use calipers. Around 62 or 63 thou. But here's your pic of the two kids.