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Posted: 6/18/2019 10:48:20 PM EDT
[#1]
Quote HistoryOriginally Posted By conda:
Since these have the gas port drilled after the barrel is torqued in, it's now out of headspace even if shimmed. Have to wait on the backorders to get a replacement. . |
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NC, USA
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Posted: 6/18/2019 11:35:49 PM EDT
[Last Edit: avatarhammer]
[#2]
HS is set by the bbl extension. Gas port location may alter the op rod function if the block is moved, but not effect HS.
How did the bbl come loose 
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Posted: 6/19/2019 7:17:38 AM EDT
[#3]
Quote HistoryOriginally Posted By BRN-180:
Nope, Mobile 1 syn brushed on is slick as snot and was noticeably smother than lots of CLP. It actually stays in place better than oil. I never used that brand until the MILSURPLUS guys told me about it for M1 Carbine use. I got the failures prior to grease not after. Once this upper has many rounds I will go back to just CLP. Although CLP isn't oil, it is generally suitable for bolt/carrier lube. Quote HistoryOriginally Posted By BRN-180:
Originally Posted By RDTCU: FYI, thick grease is going to slow your bolt down compared to oil, so you may have been inducing some of those failures. I never used that brand until the MILSURPLUS guys told me about it for M1 Carbine use. I got the failures prior to grease not after. Once this upper has many rounds I will go back to just CLP. Although CLP isn't oil, it is generally suitable for bolt/carrier lube. |
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IA, USA
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Posted: 6/19/2019 8:53:40 AM EDT
[#4]
Quote HistoryOriginally Posted By avatarhammer:
HS is set by the bbl extension. Gas port location may alter the op rod function if the block is moved, but not effect HS. How did the bbl come loose The 180 has a trunion, so shimming it and torquing it so the gas block is aligned might result in extra headspace. There is no barrel extension. |
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NC, USA
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Posted: 6/19/2019 1:18:36 PM EDT
[#5]
Wow. If the bbl can come loose that easily, affecting HS, I'd have second thoughts about the design. Don't know why they didn't just adapt the ar15 design.
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ID, USA
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Posted: 6/19/2019 1:36:39 PM EDT
[Last Edit: Dusted]
[#6]
Delete I’m an idiot
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Posted: 6/19/2019 1:38:25 PM EDT
[Last Edit: RDTCU]
[#7]
Quote HistoryOriginally Posted By avatarhammer:
Wow. If the bbl can come loose that easily, affecting HS, I'd have second thoughts about the design. Don't know why they didn't just adapt the ar15 design. If you're referencing the index pin, that doesn't actually protrude into the barrel to lock it into the extension. |
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ID, USA
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Posted: 6/19/2019 1:49:05 PM EDT
[#8]
Conda you’re famous on the ol Facebook, that photo is making the rounds on the weapon malfunctions page
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IA, USA
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Posted: 6/19/2019 2:59:54 PM EDT
[Last Edit: conda]
[#9]
Quote HistoryOriginally Posted By Dusted:
Conda you’re famous on the ol Facebook, that photo is making the rounds on the weapon malfunctions page Anyway, I mailed the thing off today and we will see how long it takes to get a replacement back. I don't think the design is bad, many rifles use torqued in threaded barrels and it hasn't been an issue, the issue is when its not torqued in. If it was torqued to the 120+ ft/lb level this would never happen. The handguard even reinforces the barrel from rotating based on how tightly it fits over the barrel. Again, this isn't Brownells fault. The BRN-180 I had worked like a charm and was great, just would have been better if the barrel was torqued properly. I'm sure it was a mistake on assembly or a missed step that has since (hopefully) been corrected. I thought about keeping it under my hat because I didn't want Brownells and the BRN-180 to get a bad wrap for one bad apple, but I was a bit frustrated because having the barrel stay in is a pretty basic expectation of an upper in my book. |
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ID, USA
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Posted: 6/19/2019 8:17:30 PM EDT
[#10]
I checked mine after seeing your post and it appears to be torqued in good, I have around 750 through it
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Posted: 6/19/2019 8:33:54 PM EDT
[#11]
Quote HistoryOriginally Posted By BRN-180: It is not a issue. People need to get over it. People always want something more, more, more. Many great weapons had and have a recip handle. FNC SCAR M14 M1 Carbine. Mini-14/AC-556 Ruger PC AK-47 ETC, ETC, ETC. |
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USA
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Posted: 6/21/2019 11:48:43 AM EDT
[Last Edit: BRN-180]
[#12]
Brownells announced that a NEW piston cup in now available.
So that makes 3 cups. Very nice. Current upgrades available on request now are: Dust cover. Piston cup. |
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NC, USA
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Posted: 6/21/2019 1:55:53 PM EDT
[#13]
Quote HistoryOriginally Posted By RDTCU:
It's no different than an AR barrel extension coming loose on the barrel, which happened all the time when nitriding/meloniting took off, until manufacturers figured out that you can't nitride the barrel as an assembly and you should drill the gas port last. If you're referencing the index pin, that doesn't actually protrude into the barrel to lock it into the extension. Quote HistoryOriginally Posted By RDTCU:
Originally Posted By avatarhammer:
Wow. If the bbl can come loose that easily, affecting HS, I'd have second thoughts about the design. Don't know why they didn't just adapt the ar15 design. If you're referencing the index pin, that doesn't actually protrude into the barrel to lock it into the extension.  Design similar to the AR -- bbl extension torque to bbl and then into receiver. I wasn't aware the BRN180 had its geometry fixed by a trunion. Hence shimming, to get proper torque will change HS, and just retorqing will move the gas port and most likely change HS too.
No worries about the design, after clarification 
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USA
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Posted: 6/21/2019 1:56:49 PM EDT
[Last Edit: BRN-180]
[#14]
I LOVE this. I added the Holosun awhile back. Nice sight.
Brownells should make a deal with Sig to make this discontinued stock available again. It is by far the best option I have come across. 
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NC, USA
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Posted: 6/21/2019 2:09:28 PM EDT
[#15]
Quote HistoryOriginally Posted By BRN-180:
http://i63.tinypic.com/34822xl.jpg Now how to make one look Retro with a modern flair. |
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USA
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Posted: 6/22/2019 9:54:12 AM EDT
[#16]
What I would like to know is what Brownells is doing with returned units?
They are replacing the returns but what about the returns. They generally can't be sold as new, so are they just eating the cost on them? They should fix them and sell they as refurbished. I would want one if the cost is low. PWS is probably sitting on a bunch that just need to be broken in or a new buffer or minor things. |
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MT, USA
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Posted: 6/22/2019 12:59:24 PM EDT
[Last Edit: tommyidone]
[#17]
Quote HistoryOriginally Posted By BRN-180:
I LOVE this. I added the Holosun awhile back. Nice sight. Brownells should make a deal with Sig to make this discontinued stock available again. It is by far the best option I have come across. http://i63.tinypic.com/34822xl.jpg Edit: Looks like brownels right got some in stock!!! |
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USA
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Posted: 6/22/2019 1:13:42 PM EDT
[#18]
Quote HistoryOriginally Posted By tommyidone:
I looked forever for one of those stocks and finally found a retailer with only one left. I bought it right there. I hope I didn’t get the last one because I love this stock. For a think side folder it’s excellent. I wonder why sig discontinued it. Edit: Looks like brownels right got some in stock!!! |
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MT, USA
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Posted: 6/22/2019 2:48:31 PM EDT
[#19]
Well then I’m happy I got mine. Soon as we get done building our house I’ll be ordering the 180-s upper and possibly a 180 standard length for my non sbr lower. Depending on if they get an adjustable piston up front
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USA
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Posted: 6/22/2019 3:01:11 PM EDT
[Last Edit: BRN-180]
[#20]
This is another option and a damn low price shipped. Lowest out there. $149.95 shipped.
If they release a 7.62X39 BRN-180, this will go on it. 
https://www.swfa.com/sig-sauer-telescoping-folding-stock-3.html |
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USA
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Posted: 6/22/2019 3:27:02 PM EDT
[#21]
And for those that are getting the BRN-180S. This is a damn low price on the brace model $149.95 shipped.
ONLY TWO UNITS LEFT. 
https://www.swfa.com/sig-sauer-folding-pcb-kit.html |
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MT, USA
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Posted: 6/23/2019 12:33:31 AM EDT
[#22]
I like the original folder. It a fan of the telescoping unit
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USA
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Posted: 6/23/2019 4:57:40 PM EDT
[Last Edit: BRN-180]
[#23]
I requested the new piston cup upgrade via a IM just now.
It will be nice if I ever wanted to use low power .223 ammo. I do plan on doing a carrier travel test before I regularly shoot it with the new cup. Tape across the charging handle slot to determine max rearward travel obtained so I don't get the carrier hitting the buffer. Right now with XM193 I get nice cycle and no buffer contact. |
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ID, USA
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Posted: 6/23/2019 10:07:01 PM EDT
[Last Edit: Dusted]
[#24]
I think the new stock style is the way to go, adjustable and compatible with any AR stock you desire.
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MD, USA
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Posted: 6/26/2019 10:44:57 PM EDT
[#25]
Quote HistoryOriginally Posted By BRN-180:
I requested the new piston cup upgrade via a IM just now. It will be nice if I ever wanted to use low power .223 ammo. I do plan on doing a carrier travel test before I regularly shoot it with the new cup. Tape across the charging handle slot to determine max rearward travel obtained so I don't get the carrier hitting the buffer. Right now with XM193 I get nice cycle and no buffer contact. |
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USA
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Posted: 6/26/2019 11:25:29 PM EDT
[#26]
Quote HistoryOriginally Posted By Surfgun: So, did Brownells reply to your request? I instant messaged and e-mailed Brownells and Brownells has not replied to my request for the 3rd type piston cup. i would think the piston will be the same. ask for one and wait a few days. |
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GA, USA
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Posted: 6/28/2019 11:35:11 PM EDT
[#27]
Quote HistoryOriginally Posted By BRN-180:
And for those that are getting the BRN-180S. This is a damn low price on the brace model $149.95 shipped. ONLY TWO UNITS LEFT. https://www.swfa.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/s/i/sigpcbxfoldblk.jpg https://www.swfa.com/sig-sauer-folding-pcb-kit.html |
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MD, USA
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Posted: 7/6/2019 3:56:30 PM EDT
[#28]
My new piston cup showed up. May be a while before I’ll get to try it though.
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ID, USA
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Posted: 7/6/2019 9:30:06 PM EDT
[#29]
Well where’s mine lol
Another rifle class today with the BRN-180 and she ran flawlessly. I’ll have to count how many loaded mags I have left but this should push her past the 1k mark. So a thousand rounds down with zero issues and a big smile on my face. |
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USA
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Posted: 7/12/2019 5:11:49 PM EDT
[Last Edit: BRN-180]
[#30]
Quote HistoryOriginally Posted By Dusted:
Well where’s mine lol Another rifle class today with the BRN-180 and she ran flawlessly. I’ll have to count how many loaded mags I have left but this should push her past the 1k mark. So a thousand rounds down with zero issues and a big smile on my face. I sent a 2nd request just now. |
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USA
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Posted: 7/17/2019 3:45:49 PM EDT
[#31]
Question: What are these two tiny parts shown next to the C clamp.
The pic is from the latest review off Brownells web site. Owner claims they fell off/out when he took it apart. Is this somekind of gen2 upgrade? I do not recall these parts on my upper????? 
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ID, USA
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Posted: 7/17/2019 9:12:19 PM EDT
[Last Edit: Dusted]
[#32]
Looks like they broke the wings on the lock piece where it interfaces with the barrel
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ID, USA
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Posted: 7/17/2019 9:17:51 PM EDT
[Last Edit: Dusted]
[#33]
Piston cups, from left to right the original, new and suppressed. The initial holes have moved up into the second relief on the gas nipple and are smaller, looks like they took the suppressed cup and left the additional initial hole set off. The initial holes are smaller on the new cup but they are placed directly over the second relief grove on the nipple.
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ID, USA
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Posted: 7/17/2019 9:22:38 PM EDT
[#34]
Both the new cup and the suppressor cups fitment on the nipple is not as tight compared to the original cup
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USA
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Posted: 7/19/2019 9:58:34 AM EDT
[Last Edit: BRN-180]
[#35]
Quote HistoryOriginally Posted By Dusted:
Piston cups, from left to right the original, new and suppressed. The initial holes have moved up into the second relief on the gas nipple and are smaller, looks like they took the suppressed cup and left the additional initial hole set off. The initial holes are smaller on the new cup but they are placed directly over the second relief grove on the nipple. https://m.imgur.com/gallery/fLxeN9s 
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ID, USA
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Posted: 7/19/2019 7:14:07 PM EDT
[#36]
How’d you fix it? Can’t seem to get mine to attach properly
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USA
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Posted: 7/20/2019 8:13:41 AM EDT
[#37]
Quote HistoryOriginally Posted By Dusted:
How’d you fix it? Can’t seem to get mine to attach properly .jpeg, yours ended with something different. |
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IA, USA
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Posted: 7/25/2019 4:41:26 PM EDT
[#38]
Hey all, After sending back my automatically de-barreling BRN180 they sent me a new one and honestly this one is a lot better.
The fitment is a touch looser on the lower, but it is just as id expect most mil-spec uppers to fit. The upper took NO break in to function perfectly. I started with single shots thinking it would take a few of those to lock back every time. Shot about 5 with no issue then put a mag of 30 through it without a single malfunction. Gave it a quick "break in" clean and put about 150 rounds through without a single hiccup, and with what feels like less snappy-ness. I think this upper isn't having the carrier hit the buffer as much or as hard. Accuracy is as good as the last upper I had with 62 grains getting about 1.5 to 2 inch groups at 100 yards (given this is a 3x combat style optic and not a precision rifle scope) Dust cover opens up as soon as the action moves back about a centimeter. Honestly its a ton better. I really like how this AR has turned out. 
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ID, USA
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Posted: 7/26/2019 12:14:39 AM EDT
[#39]
Happy to see they made it right
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MP, USA
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Posted: 7/27/2019 5:45:32 PM EDT
[#40]
Quote HistoryOriginally Posted By Dusted:
Conda you’re famous on the ol Facebook, that photo is making the rounds on the weapon malfunctions page |
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ID, USA
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Posted: 7/27/2019 6:42:26 PM EDT
[Last Edit: Dusted]
[#41]
https://www.facebook.com/384329925352278/posts/707941186324482?s=100001973031595&sfns=xmwa
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USA
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Posted: 7/28/2019 11:06:09 AM EDT
[Last Edit: BRN-180]
[#42]
So, I have designed a way to use the BRN-180 in full auto.
It has a simple design without major mods. I am not sure what to do with it. I cannot test it or develop it further because it would be stupid using a transferable that could be harmed. On the other hand I do not want to give the idea away. It is on the back burner right now. |
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USA
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Posted: 8/15/2019 7:59:31 PM EDT
[#43]
member conda just reported another barrel shot loose on him.
this is two exact failures for the same person. my mind is BLOWN!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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IA, USA
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Posted: 8/16/2019 12:03:04 AM EDT
[Last Edit: conda]
[#44]
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USA
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Posted: 8/16/2019 7:17:42 AM EDT
[#45]
This doesn't look like the a simple barrel has shot loose or turned loose.
Could it be that the trunion threads have failed or enlarged due too heat? The trunion looks fixed and not moving but what if it expanded and the threads lost their grip due to heat distortion or stress distortion. |
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IA, USA
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Posted: 8/16/2019 12:10:24 PM EDT
[#46]
I can post more detailed dissasembly photos this evening if people are interested, I suspect it looks like the last one did.
I didn't see any evidence of fracture or cracking on the last upper, but I did not examine it a whole lot before sending it back to Brownells. Brownells has been in contact with me and I'm sure they will set things right. |
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ID, USA
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Posted: 8/16/2019 2:22:37 PM EDT
[#47]
Man what are the odds, 2 in a row for you and I haven’t heard of anyone else with an issue.
What did you do in a past life lol |
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IA, USA
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Posted: 8/16/2019 3:29:16 PM EDT
[#48]
Quote HistoryOriginally Posted By Dusted:
Man what are the odds, 2 in a row for you and I haven’t heard of anyone else with an issue. What did you do in a past life lol 
Kinda souring my opinion on pre-built uppers, everything else I have I've assembled myself and NEVER experienced an issue, let alone a barrel falling off. I really wonder what the total production numbers of these are along with the number of uppers that have had over 100 rounds put through them. I guess I assume people shoot them at least as much as I do, but maybe that isn't the case. |
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USA
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Posted: 8/17/2019 7:59:30 AM EDT
[Last Edit: BRN-180]
[#49]
this is what bothers me about the whole thing...........
your pics indicate that the barrel has turned less than about 25 deg. so that would mean that it still should be strongly tight in the trunion and unable to move cw or ccw without a wrench and force. yours says that it was screwed in finger tight then turned just a few deg with a barrel wrench. i would think that at install it would take maybe 45 deg past hand tight and lots of force to install. the relationship in the machining between the trunion and barrel threads does not seem correct in the ones you got. i would assume that the barrel at install would be screwed to the trunion then the trunion installed in the receiver. |
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ID, USA
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Posted: 8/18/2019 1:26:02 AM EDT
[Last Edit: Dusted]
[#50]
Quote HistoryOriginally Posted By conda: Apparently something that deserves punishment
Kinda souring my opinion on pre-built uppers, everything else I have I've assembled myself and NEVER experienced an issue, let alone a barrel falling off. I really wonder what the total production numbers of these are along with the number of uppers that have had over 100 rounds put through them. I guess I assume people shoot them at least as much as I do, but maybe that isn't the case. |
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