Author
Message
thornejc
Offline
Posts: 751
Feedback: 100% (96)
Posted: 7/27/2012 9:20:35 PM
Does anyone know if anyone make quality polygonal rifled barrels? I know Noveske say polygonal rifling but the barrels aren't true polygonal barrels but rather the grooves for the rifling are polygonal in shape. Thanks
Dodge223
Are you suggesting coconuts migrate?
Offline
Posts: 1136
Feedback: 100% (18)
Link To This Post
Posted: 7/27/2012 9:25:26 PM
Makes it really hard to use a gas block. I've seen a one in a magazine before, but it was round from the FSB forward.
You can have things done fast, good or cheap. Pick two!
Proud Member of Ranstad's Militia
ricochet7
SI VIS PACEM PARA BELLUM
Offline
Posts: 1283
Feedback: 100% (127)
Link To This Post
Posted: 7/27/2012 9:38:38 PM
I believe ARP offers polygonol barrels - 16" barrel listed as : ––1 in 8 " twist 5R rifling- .700" UTG, .750 GB, .700 muzzle

http://www.ar15performance.com/5_56_223

Is this what you mean? The 5R I believe is.
"The trouble with information you find on the internet is that it is frequently inaccurate" - Thomas Jefferson
Medicfrost
Bourbon drinking, gun toting, porn watching SOB
Offline
Posts: 2341
Feedback: 100% (152)
Link To This Post
Posted: 7/27/2012 9:43:37 PM
Originally Posted By Dodge223:
Makes it really hard to use a gas block. I've seen a one in a magazine before, but it was round from the FSB forward.


Polygonal rifling refers to the inside of the barrel, not the outside.
ICON_636
Offline
Posts: 82
Feedback: 100% (2)
Link To This Post
Posted: 7/27/2012 9:48:18 PM
Dodge223
Are you suggesting coconuts migrate?
Offline
Posts: 1137
Feedback: 100% (18)
Link To This Post
Posted: 7/27/2012 9:53:32 PM
Originally Posted By Medicfrost:
Originally Posted By Dodge223:
Makes it really hard to use a gas block. I've seen a one in a magazine before, but it was round from the FSB forward.


Polygonal rifling refers to the inside of the barrel, not the outside.


I guess I miss understood the OP's post then.
You can have things done fast, good or cheap. Pick two!
Proud Member of Ranstad's Militia
Direct-Drive
Offline
Posts: 2949
Feedback: 0% (0)
Link To This Post
Posted: 7/27/2012 10:12:23 PM
Originally Posted By ricochet7:
I believe ARP offers polygonol barrels - 16" barrel listed as : ––1 in 8 " twist 5R rifling- .700" UTG, .750 GB, .700 muzzle

http://www.ar15performance.com/5_56_223

Is this what you mean? The 5R I believe is.

I don't think that this is polygonal.
5R is more closely related to conventional rifling.

Polygonal is a different animal.
Black Hole and Noveske use it.
JmPnTX
Member
Offline
Posts: 4493
Feedback: 100% (8)
Link To This Post
Posted: 7/27/2012 10:17:16 PM
[Last Edit: 7/27/2012 10:30:14 PM by JmPnTX]
Originally Posted By ICON_636:
http://blackholeweaponry.com/


BHW.



How does your rifling work?

The shape of the lands and grooves are based on a circle, so there are no sharp corners or edges for the bullet to conform into. This means there is a tight seal and thus less bullet deformation. This rifling form is unique in its ability to allow the bullet to be centered and fully supported by the barrel’s bore.


Read more: http://www.blackholeweaponry.proboards.com/index.cgi?board=faq&action=display&thread=57#ixzz21sbXi8rn


Noveske is a little closer to a conventional type rifling but with the sharp edges of the lands being gently ramped down instead... But do they ever make some sweet accurate barrels!

From a Molon review, http://www.ar15.com/forums/t_3_118/467919_.html


ricochet7
SI VIS PACEM PARA BELLUM
Offline
Posts: 1284
Feedback: 100% (127)
Link To This Post
Posted: 7/27/2012 10:49:49 PM
[Last Edit: 7/28/2012 10:58:32 AM by ricochet7]
Originally Posted By Direct-Drive:
Originally Posted By ricochet7:
I believe ARP offers polygonol barrels - 16" barrel listed as : ––1 in 8 " twist 5R rifling- .700" UTG, .750 GB, .700 muzzle

http://www.ar15performance.com/5_56_223

Is this what you mean? The 5R I believe is.

I don't think that this is polygonal.
5R is more closely related to conventional rifling.

Polygonal is a different animal.
Black Hole and Noveske use it.


My bad, I live and learn. Am looking at a 5R in 6.8 for my next build, was thinking wrong Not my first mistake Nor my last
++ And I even have a Noveske N4 with polygonal rifling, duh!! I get confused being dyslexic
Damned, I read Molon's article wrong, mistook his N4 info- surgery, Morphine and keyboards are a bad mix, I guess...
"The trouble with information you find on the internet is that it is frequently inaccurate" - Thomas Jefferson
gunner01
Member
NRA
Offline
Posts: 1402
Feedback: 100% (3)
Link To This Post
Posted: 7/27/2012 11:25:24 PM
Black Rain Ordnance!
Aspp
Offline
Posts: 42
Feedback: 100% (2)
Link To This Post
Posted: 7/28/2012 12:07:34 AM
Originally Posted By ICON_636:
http://blackholeweaponry.com/


This

AAMP84
Member
Offline
Posts: 39
Feedback: 100% (8)
Link To This Post
Posted: 7/28/2012 2:56:17 AM
Lothar Walther
Skammy
Captain Fu***ng Magic
Offline
Posts: 5546
Feedback: 100% (5)
Link To This Post
Posted: 7/28/2012 3:29:44 AM
That's my lothar walther
Wanted: Someone to start a revolution in CA -Pthfndr
Talon Arms and Defensive Edge / SLR15 support their fellow gun owners..
Some high school + guns + paranoia = General Discussion
Gamma762
Member
Offline
Posts: 21547
Feedback: 90% (10)
Link To This Post
Posted: 7/28/2012 5:04:50 AM
[Last Edit: 7/28/2012 5:06:55 AM by Gamma762]
The PacNor/Noveske "7P", Lothar Walther, Shilen's "ratchet rifling" and the various 5R types are all a similar concept of modified lands of rifling.
This is...a clue - Pat_Rogers
I'm not adequately aluminumized for this thread. - gonzo_beyondo
CO, FL, MI, SC, NH - Please lobby your legislators to end discrimination against non-resident CCW permit holders
USMC_JA
Offline
Posts: 1190
Feedback: 100% (26)
Link To This Post
Posted: 7/28/2012 9:50:06 AM
Originally Posted By ricochet7:
Originally Posted By Direct-Drive:
Originally Posted By ricochet7:
I believe ARP offers polygonol barrels - 16" barrel listed as : ––1 in 8 " twist 5R rifling- .700" UTG, .750 GB, .700 muzzle

http://www.ar15performance.com/5_56_223

Is this what you mean? The 5R I believe is.

I don't think that this is polygonal.
5R is more closely related to conventional rifling.

Polygonal is a different animal.
Black Hole and Noveske use it.


My bad, I live and learn. Am looking at a 5R in 6.8 for my next build, was thinking wrong Not my first mistake Nor my last
++ And I even have a Noveske N4 with polygonal rifling, duh!! I get confused being dyslexic


N4 barrels are not polygonal to my knowledge....only noveske SS barrels get the poly treatment.
Humbarger
Offline
Posts: 146
Feedback: 100% (2)
Link To This Post
Posted: 7/28/2012 9:58:04 AM
[Last Edit: 7/28/2012 10:03:15 AM by Humbarger]
Lothar Walther makes excellent polygon rifled barrels.

http://www.lothar-walther.com/380.php

BTW the Japanese were useing polygon or (orb) as they called it in their Arisakas & MGs
in WWII because of the harsh jungle enviroments that the rifles were used in.
Those bores are also chrome plated.
erne75
Offline
Posts: 388
Feedback: 100% (6)
Link To This Post
Posted: 7/28/2012 10:25:33 AM
I have a BHW 18" SS rifle gas barrel coming in next week for a SPR build that I'm working on. I have read good things about then and got it cheap from surplusammo.com
thornejc
Offline
Posts: 755
Feedback: 100% (96)
Link To This Post
Posted: 7/28/2012 9:17:29 PM
Originally Posted By Dodge223:
Makes it really hard to use a gas block. I've seen a one in a magazine before, but it was round from the FSB forward.


The inside is polygonal and the outside is round... like glock barrels. Definitely don't want my rifle to look like some winchester 1873/AR hybrid.
thornejc
Offline
Posts: 756
Feedback: 100% (96)
Link To This Post
Posted: 7/28/2012 9:19:14 PM
Originally Posted By ricochet7:
I believe ARP offers polygonol barrels - 16" barrel listed as : ––1 in 8 " twist 5R rifling- .700" UTG, .750 GB, .700 muzzle

http://www.ar15performance.com/5_56_223

Is this what you mean? The 5R I believe is.


Not what I am looking at... thats not true polygonal. I am looking for something without lands and grooves
JmPnTX
Member
Offline
Posts: 4497
Feedback: 100% (8)
Link To This Post
Posted: 7/28/2012 9:27:37 PM
[Last Edit: 7/28/2012 9:37:59 PM by JmPnTX]
Black Hole Weaponry barrels in stock at Surplus Arms. $229

rifle length (and they also have mid-length in stock)
http://www.surplusammo.com/blackhole-weaponry-ar-15-18-rifle-length-stainless-steel-5-56-1-8-poly-barrel/

And they have a deal for a free stripped upper with purchase of a BHW barrel...
erne75
Offline
Posts: 389
Feedback: 100% (6)
Link To This Post
Posted: 7/28/2012 9:47:07 PM
Originally Posted By JmPnTX:
Black Hole Weaponry barrels in stock at Surplus Arms. $229

rifle length (and they also have mid-length in stock)
http://www.surplusammo.com/blackhole-weaponry-ar-15-18-rifle-length-stainless-steel-5-56-1-8-poly-barrel/

And they have a deal for a free stripped upper with purchase of a BHW barrel...


This is exactly what I bought...
MIKE2
Offline
Posts: 87
Feedback: 100% (5)
Link To This Post
Posted: 7/29/2012 10:36:26 AM
great, now i found something else i want.