Rainier Arms Select™ 5.56MM Fluted Barrel - 16 SS

[UWone77]

The Rainier Arms (https://www.rainierarms.com/?page=shop/detail&product_id=4190) Select Barrels are here, now with fluting. Awhile back Rainier Arms had some test barrels with fluting and because of the great response they had, are now offering these fluted Stainless barrels. They feature the same specs as the standard Select barrels, but these obviously have the additional fluting, which not only increases the surface area, but look great as well. Checkout the Rainier Arms website (https://www.rainierarms.com/?page=shop/detail&product_id=4190) for more information and ordering!



Description:

There are a number of advantages to polygonal rifled barrels; such as less bullet deformation, resulting in reduced drag as well as prolonged barrel life, not to mention ease of cleaning. These barrels were made to our exact specifications & drawings and made of 416R Stainless steel. We control the manufacturing process to provide the most accurate barrel in its price range. We are so confident in our Select grade barrels that we will offer a 100% money back guarantee within 90 days of purchase, no questions asked. If you aren't completely satisfied with the barrel for any reason, return it for a full refund. Guaranteed to shoot sub-MOA at 100 yards with match ammo. You deserve this confidence inspiring barrel for your next custom build.


Features:

416 R ordnance grade stainless steel produced in Germany by the same mill as H&K
F bar rated = meaning it is acceptable for use by all Nato country’s
Extensions made from 4140 AE = meaning aircraft grade steel
Manufacturing proprietary processes creates a stress free product that has a hardened surface on the bore. To improve the wear and longevity
M4 feed ramps on extensions to current production standards to ensure conformance between manufactures


Specs:

Barrel Length: 16"
Gas Block Seat: .750
Rifling: Polygonal 5 Groove
Weight: 32.0 oz
Stainless Steel: 416R
Feed Ramps: M4
Gas System: Midlength
Chamber: 5.56MM
Finish: Matte Stainless
Twist: 1X8
Thread Pitch: 1/2X28
Testing: MPI tested

Made in the USA!



http://i849.photobucket.com/albums/ab55/UWone77/001d0d6076c029750927860d22aa24b0_zps5d784996.jpg (http://s849.photobucket.com/user/UWone77/media/001d0d6076c029750927860d22aa24b0_zps5d784996.jpg.h tml)
http://i849.photobucket.com/albums/ab55/UWone77/a3b61315ef6cd69bde0bb958268a226a_zpsd544a884.jpg (http://s849.photobucket.com/user/UWone77/media/a3b61315ef6cd69bde0bb958268a226a_zpsd544a884.jpg.h tml)
http://i849.photobucket.com/albums/ab55/UWone77/d46be2fe5a822eb9c60ef392acc4a837_zps06c33045.jpg (http://s849.photobucket.com/user/UWone77/media/d46be2fe5a822eb9c60ef392acc4a837_zps06c33045.jpg.h tml)

[UWone77]

Now available in Black Oxide:

http://i849.photobucket.com/albums/ab55/UWone77/4841cfe8a9d1792a8e076c521e57bcd9_zpsfc436941.jpg (http://s849.photobucket.com/user/UWone77/media/4841cfe8a9d1792a8e076c521e57bcd9_zpsfc436941.jpg.h tml)


With the new Comp:

http://i849.photobucket.com/albums/ab55/UWone77/e47108fcb2a7ee678a606d09c6d2d077_zpsbec4a03f.jpg (http://s849.photobucket.com/user/UWone77/media/e47108fcb2a7ee678a606d09c6d2d077_zpsbec4a03f.jpg.h tml)

[Army203]

Any word if they plan on blacking the flutes?

[mustangfreek]

Awesome..:P

[Computalotapus]

Man RA is busting out products so fast my bank account is in behlemic mode. These barrels are hot.


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[tactical cowboy]

that is a new level of I want, I need!!!

[mustangfreek]

Man RA is busting out products so fast my bank account is in behlemic mode. These barrels are hot.


Sent from my iPhone using Tapatalk

X10000..

[Computalotapus]

So looked at the NorthTech barrels and they are going to be chambered for .223. So I think this RA barrel is going to make it on my list. Thinking maybe cerakote it red and fill the flutes with black.

[RiverRat]

So looked at the NorthTech barrels and they are going to be chambered for .223. So I think this RA barrel is going to make it on my list. Thinking maybe cerakote it red and fill the flutes with black.

The Northtech barrels are chambered in .223 WYLDE (http://en.wikipedia.org/wiki/.223_Wylde), not .223 Remington. The Wylde chamber will easily handle 5.56 NATO if that was your concern.

[Computalotapus]

The Northtech barrels are chambered in .223 WYLDE (http://en.wikipedia.org/wiki/.223_Wylde), not .223 Remington. The Wylde chamber will easily handle 5.56 NATO if that was your concern.




Aah I didn't see it was Wylde. The wife just showed me what Rob from NTD texted her and it just said .223. Hmm solid red barrel or red barrel with black flutes....decisions decisions.





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[DKshooter]

Sorry to dig this one up but I need a favor. If anyone has one of these barrels loose can you measure from the very end of the chamber end to the gas block seat? I am wanting to get this barrel and run a piston kit on it, the dimension I am looking for is important so I will know if this will work for me or not. I have heard that various manufactures of parts have slightly different dimensions on things.

[UWone77]

Sorry to dig this one up but I need a favor. If anyone has one of these barrels loose can you measure from the very end of the chamber end to the gas block seat? I am wanting to get this barrel and run a piston kit on it, the dimension I am looking for is important so I will know if this will work for me or not. I have heard that various manufactures of parts have slightly different dimensions on things.

Have you seen anyone with a 16" Select barrel running a piston kit? Should be the same dimensions as this is just a Black Hole Weaponry Barrel.

Otherwise, I can try to get you measurements tonight-ish

[DKshooter]

I have not, what should I search for to find this? Believe me tracking down a barrel that fit so many options that I was looking for was hard enough. It would be my luck to have it not work. I am looking for a 9.866" dimension from the end of the barrel chamber extension to the gas block seat.

[Bear Creek Arsenal]

Very sleek barrel :)

[alamo5000]

I have not, what should I search for to find this? Believe me tracking down a barrel that fit so many options that I was looking for was hard enough. It would be my luck to have it not work. I am looking for a 9.866" dimension from the end of the barrel chamber extension to the gas block seat.

I just did a rough measure and mine is about 9.25" from the front of the upper ...given a couple of caveats. My measurements were really rough and my barrel isn't fluted.

Not to change the subject but why do you want a piston system?

[DKshooter]

Thanks, the measurement I need would have to be taken with the barrel off or unmounted though. I want a piston system because they are really reliable these days and they keep your gun much more cleaner.

[alamo5000]

Thanks, the measurement I need would have to be taken with the barrel off or unmounted though. I want a piston system because they are really reliable these days and they keep your gun much more cleaner.

I can't help with the barrel off measurement... But I investigated the whole piston system thing and I have to disagree on the whole "cleaner" argument that a lot of people use for piston systems.

[BoilerUp]

I have not, what should I search for to find this? Believe me tracking down a barrel that fit so many options that I was looking for was hard enough. It would be my luck to have it not work. I am looking for a 9.866" dimension from the end of the barrel chamber extension to the gas block seat.

Sounds like you are looking for a mid-length gas barrel. What piston system are you considering (or already have)?

http://www.hornady.com/assets/templates/site/images/superformance_gas.JPG

Source: http://www.hornady.com/ammunition/superformance-in-gas-operated-firearms

[DKshooter]

Adams arms

[BoilerUp]

Adams arms

http://www.adamsarms.net/resources/gaslength.pdf

If you know you need 9.866" from receiver extension face to gas block then you mush have a mid-length piston. Which means you need a barrel with mid-length gas. Beyond that, you just need to make sure the barrel has the right gas block size (presumably .750 unless you bought the .625 version for lightweight barrels)

[DKshooter]

Yes I am aware of all of this. I am just waiting to make sure that the specs on this barrel will meet the specs that are required for the piston setup before I buy it. If they decided on these barrels that the gas block seat was .050"-.100" in either direction this would be bad. There is very little adjustment that can be done on these and I have seen the aftermath of what happens when a barrel has an out of spec gas block seat when used with this exact piston kit

[UWone77]

Thanks, the measurement I need would have to be taken with the barrel off or unmounted though. I want a piston system because they are really reliable these days and they keep your gun much more cleaner.

I've had an AA Kit installed on a PSA upper for several years now.

It's definitely not cleaner. It runs and runs, but the plug is now stuck at one position. Multiple applications of Kroil hasn't made it budge. AA has offered to address it for me if I send it in, but haven't so far, so I can't really complain too much about that. However, cleaner is not accurate. The dirt and gasses so somewhere, just not directly into the chamber.

[BoilerUp]

Yes I am aware of all of this. I am just waiting to make sure that the specs on this barrel will meet the specs that are required for the piston setup before I buy it. If they decided on these barrels that the gas block seat was .050"-.100" in either direction this would be bad. There is very little adjustment that can be done on these and I have seen the aftermath of what happens when a barrel has an out of spec gas block seat when used with this exact piston kit

I would trust a Rainier barrel to be in spec, but give them a call directly if you have any doubts.