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Re: Removing the remaining receiver scraps off the trunnions by Pryotex
Today at 04:07:28 AM

Re: Removing the remaining receiver scraps off the trunnions by Sprat
August 17, 2017, 04:56:12 PM

Re: Removing the remaining receiver scraps off the trunnions by Sprat
August 17, 2017, 04:53:30 PM

Re: SAR 80 by Intelflyer
August 14, 2017, 01:36:32 PM

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Re: Rehandling/refinishing older knife by Gulf state gaurd
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Re: Rehandling/refinishing older knife by sdk1968
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Re: Rehandling/refinishing older knife by pamrick
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Re: Rehandling/refinishing older knife by Gulf state gaurd
August 06, 2017, 06:47:22 PM

Re: Rehandling/refinishing older knife by pamrick
August 06, 2017, 06:56:10 AM

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Author Topic: SAR 80  (Read 7194 times)

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Skyhighplt

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SAR 80
« on: January 24, 2017, 02:57:12 PM »
Has anyone received their SAR 80 kit yet?

The kits are new before torching, heartbreaking. 

« Last Edit: April 03, 2017, 03:58:58 PM by Skyhighplt »

Offline Sevo

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Re: SAR 80 Help
« Reply #1 on: January 24, 2017, 11:11:11 PM »
Al i am looking forward to your build. I am sure it's going to be tough to find info so please let us know how this all goes.

Thank you for taking time to post your build. I'm along for the ride for sure

What will you do for the receiver
WTB- M60  Parts- any and all, including E/D
WTB- 1918 BAR parts-  need internals and trigger group
WTB- MG34/42 parts- any
WTB- MAC SMG parts/kits

Offline Sevo

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Re: SAR 80 Help
« Reply #2 on: January 24, 2017, 11:56:46 PM »
Looking forward to the pics

So there is enough receiver for a reweld?  If that then that kit is worth that momey
WTB- M60  Parts- any and all, including E/D
WTB- 1918 BAR parts-  need internals and trigger group
WTB- MG34/42 parts- any
WTB- MAC SMG parts/kits

Offline Sprat

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Re: SAR 80 Help
« Reply #3 on: January 25, 2017, 05:39:44 PM »
we had a group buy over at ar-180  so our kits will be in next week,  we are experienced ar-180 owners
we are doing a run on new us made barrel and we think we have the new receiver figured. if you get a ar-180 barrel to properly fit lets us know  also do you have a source for ar-180 barrels????????

Skyhighplt

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Re: SAR 80 Help
« Reply #4 on: January 25, 2017, 05:46:01 PM »
Numeric $125 on the AR 180's.



Keep me up to date on the receiver.  I know it's thin but it looks like the receiver could be welded.
« Last Edit: April 03, 2017, 04:00:28 PM by Skyhighplt »

Offline Sprat

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Re: SAR 80 Help
« Reply #5 on: January 25, 2017, 05:55:37 PM »
that barrel is not ar-180 barrel,  it is  ar-180 B barrel it may be different as it was made by a different company, different time frame  some parts interchange some do not   not sure about the barrel  it may work as a substitute

as a update  I decided over night to get the ar-180B barrel as a backup  I hate to tell you how many times I had a chance to get a barrel then they sold out worst that could happen is i will have a ar-180B barrel laying around the shop
there are numerous threads om building ar-180B and ar-180  I believe there are quite a  few on the barrel set ups for both
I am just a little busy, I will track them down later today
« Last Edit: January 26, 2017, 07:58:42 AM by Sprat »

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Re: SAR 80 Help
« Reply #6 on: January 28, 2017, 09:40:44 AM »
Here is the set up that John used when he did my first prototype 180B shorty.



Reaction rod

I don't know if it will fit the SAR-80 trunion.

It was really important on the 180B because it used a modified AR15 extension pressed into the trunion and if you tried to clamp the trunion and turn the barrel out the extension would turn in the trunion.

The 180 or 18 had a one piece trunion so that method should work. Cheater bar will be necessary.

Offline Ducky

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Re: SAR 80 Help
« Reply #7 on: January 29, 2017, 02:54:30 PM »
My thought on the SAR80 barrel question. If enough of us get together...we approach GM Barrels as a group...Have them cut us barrels with correct dimensions, threads and length. I am betting they or another barrel manufacturer would do this for the right quantity.

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Re: SAR 80 Help
« Reply #8 on: January 29, 2017, 05:02:44 PM »
My thought on the SAR80 barrel question. If enough of us get together...we approach GM Barrels as a group...Have them cut us barrels with correct dimensions, threads and length. I am betting they or another barrel manufacturer would do this for the right quantity.

If you have the prints the min run qty is 150. Chrome lined US.

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Re: SAR 80 Help
« Reply #9 on: January 29, 2017, 05:50:36 PM »
that is a lot. Then the next option is buy GM AR blanks and modify the profil, the treads and length...

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Re: SAR 80 Help
« Reply #10 on: January 31, 2017, 05:59:40 AM »
sorry I am away of business and do not have the time to chat. I read Ricks ppost about barrel removal. I am probably go to his guy and remove the stub from the trunnion.  I would like to do it myself but the tools and technique seem unique

I have learned that to rush into these things does not produce a good final product.  I am going to wait till we all receive our kits and go unified.  I got your message about the receiver   ok so its a box  that makes it easier than say a sig stg-57 or Ar-70 box receiver
seems like reverse engineering will do the trick

I got a e-mail yesterday our kits are going out

Offline BigRix

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Re: SAR 80 Help
« Reply #11 on: February 03, 2017, 05:15:38 PM »
Well the kits came in while I was out of town so I tore up the box and went to work as soon as I got home.

Popped the barrel off and I was not expecting this.





That trunion is not what I was expecting. I knew it was thinner from the AR180 and I was wondering how there would be enough threads. Now I know.

Here are the stubs next to an original AR180 barrel. (Not the 180B barrel that Numrich is selling)



180 barrel on the bottom and SAR80 on top. It's a match.



180 Barrel screwed into the SAR80 trunion.



Using the lower hand guard as a guide I think the front sight block is in just about the right spot.





Now thats not the greatest news because 180 barrels are only slightly easier to find than SAR80 barrels. The good news is that 180 dimensions can be used for much of the barrel and we should be able to put together a set of prints.

The 180B barrels are really nothing more than a differently profiled AR15 barrel with no extension installed. They can be modified to work but the biggest challenge is making the threads longer so that the 5.56 cartridge can headspace.

As a side note I plan to make a shorty 180 with the barrel stub. If anyone wants to get rid of their stub let me know I would love to have them. Maybe I could separate stubs from trunions in exchange for y'all.




Skyhighplt

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Re: SAR 80 Help
« Reply #12 on: February 03, 2017, 08:58:37 PM »
Well the kits came in while I was out of town so I tore up the box and went to work as soon as I got home.

Popped the barrel off and I was not expecting this.





That trunion is not what I was expecting. I knew it was thinner from the AR180 and I was wondering how there would be enough threads. Now I know.

Here are the stubs next to an original AR180 barrel. (Not the 180B barrel that Numrich is selling)



180 barrel on the bottom and SAR80 on top. It's a match.



180 Barrel screwed into the SAR80 trunion.



Using the lower hand guard as a guide I think the front sight block is in just about the right spot.





Now thats not the greatest news because 180 barrels are only slightly easier to find than SAR80 barrels. The good news is that 180 dimensions can be used for much of the barrel and we should be able to put together a set of prints.

The 180B barrels are really nothing more than a differently profiled AR15 barrel with no extension installed. They can be modified to work but the biggest challenge is making the threads longer so that the 5.56 cartridge can headspace.

As a side note I plan to make a shorty 180 with the barrel stub. If anyone wants to get rid of their stub let me know I would love to have them. Maybe I could separate stubs from trunions in exchange for y'all.

I wonder if it was close it you could trim the trunnion extension down. 

What's your plans for the receiver?

Offline Sprat

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Re: SAR 80 Help
« Reply #13 on: February 04, 2017, 08:12:34 AM »
rick

yes good news on the ar-180 barrels.  question  how did you pop off the stub from the trunnion

since you did it that fast I suspect you barrel vised up the stub and turned the trunnion????

Jack

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Re: SAR 80 New pics of barrel removal 2/4 and 180B barrel
« Reply #14 on: February 04, 2017, 01:12:21 PM »
I think the 180B barrel is a great starting point. I ordered one myself.

The length of thread difference is about .055" if I recall correctly. Your idea of trimming the front of the trunion to set headspace is genius, way easier than turning the barrel. This means that if someone wanted to make an exact barrel profile for the SAR80 one of green mountain's prechambered AR15 barrels could be used as well.

The next problem to overcome with the 180B barrel is the front sight base boss. It os .750" on the B and .625" on the 180 and the SAR80. The boss will have to be turned to size or the hole in the front sight base opened up. Turning would be the preferred method because the shoulder that the front hand guard retainer fits up against will now be back too far because of the headspace issues. Turning the barrel will allow that part to be profiled correctly.

Now for an interesting finding today.

The original Sterling 180 barrel is a perfect fit. The dimensions are right on the money as far as length to the front sight base boss.






 

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