XD Talk

  • Home
  • Forum
  • Active Topics
  • Gallery
  • Social Groups
  • Search
  • Today's Posts
  • Mark Forums Read
  • Register
  • Advertise

ar15 .270 conversion

This is a discussion on ar15 .270 conversion within the AR Talk forums, part of the Long Gun Talk category; Does an ar15 .270 conversion upper exist? If not what about .243?...


Reply
Old 09-03-2008, 10:27 PM   #1
XDTalk Member
 
Member #: 23159
Join Date: Feb 2008
Location: San Antonio Area
Posts: 85
ar15 .270 conversion

Does an ar15 .270 conversion upper exist? If not what about .243?
Reload 02 is offline   Reply With Quote
Remove Ads
Old 09-04-2008, 07:24 AM   #2
XDTalk 100 Member
 
Member #: 22193
Join Date: Dec 2007
Posts: 253
I've seen a .243 WSSM.
rsb5772 is offline   Reply With Quote
Old 09-04-2008, 08:06 AM   #3
XDTalk 1K Member
 
vafish's Avatar
 
Member #: 9980
Join Date: Apr 2006
Location: Northern VA
Posts: 1,955
.270 is based on .30-06 case. Will not fit standard AR15 or AR10 receivers. IIRC Cobb rifles makes a semi auto AR like rifle in .30-06, they may make .270 as well.

.243 is based on .308 case. It will not fit in standard AR15 action. It will fit in AR10 action and a couple of companies make .243 AR10's.

If you want a .270 caliber in the AR15 look for a 6.8 SPC. It's a fairly new round made for the spec ops guys that wanted something bigger than 5.56/.223. Remington makes ammo for it and many people are making AR's or upper kits for it.
__________________
\"If your plan is for one year, plant rice.
If your plan is for ten years, plant trees.
If your plan is for one hundred years,
educate children.\" -- Confucius
vafish is offline   Reply With Quote
Old 09-04-2008, 09:09 PM   #4
XDTalk 500 Member
 
Sharkbait's Avatar
 
Member #: 5448
Join Date: Feb 2005
Posts: 568
According to Modern Reloading Second Edition by Richard Lee the Overall Lengths are as follows:
.223 Rem is 2.26” long (pg 222 )
.308 Win is 2.81” long (pg 424)
.270 Win is 3.34” long (pg 331)
And by way of comparison the 30-06 Spr is 3.34” long (pg 444)

My point is that a .270 Win will not even fit in a .308 chambered AR or the magazines, it is .53” longer than the .308. If you do some hunting I am sure you will find someone making an AR platform long enough to handle the .270 but I am guessing you will pay out the … for it and I am not talking about your nose.

Good luck and happy hunting.
__________________
Red Ryder BB Gun
Tom Mix pocket Knife
A Bad Attitude
A Seriously Disgruntled Wife

Last edited by Sharkbait; 09-04-2008 at 09:10 PM. Reason: Edutted fur spellin
Sharkbait is offline   Reply With Quote
Old 09-04-2008, 09:20 PM   #5
XDTalk 10K Member
 
Cuda66's Avatar
 
Member #: 27123
Join Date: Jul 2008
Location: Kandiyohi County, MN--land of fields and lakes.
Posts: 12,902
Well, technically...

6.8mm SPC is .270 caliber.

However, it's not the same as the classic .270 Winchester round.

You could, however, get a .243 WSSM upper for an AR-15...but not a .243 Winchester (as mentioned above, you would need to go to an AR-10 platform for that).
__________________
When Fascism comes to America, it will be wrapped in the flag and carrying a cross. - Sinclair Lewis


Anti-intellectualism has been a constant thread winding it's way through our political and cultural life, nurtured by the false notion that democracy means that "my ignorance is just as good as your knowledge".--Isaac Asimov
Cuda66 is offline   Reply With Quote
Old 09-04-2008, 10:22 PM   #6
XDTalk Member
 
Member #: 23159
Join Date: Feb 2008
Location: San Antonio Area
Posts: 85
I don't "need" a .270. I am new to ARs and had heard there a lot of conversions and was curious. I love my new AR but I really like my 270 and was wondering ably it. What is the effective range on 223? And how is the drop past 100 yards? I just got me Stag 15.
Reload 02 is offline   Reply With Quote
Old 09-05-2008, 03:39 AM   #7
XDTalk 500 Member
 
Uncle Giggles's Avatar
 
Member #: 17703
Join Date: May 2007
Location: Lexington, KY
Posts: 582
DPMS: AR-15 Rifles, Parts and Accessories.

Looks like DPMS has a couple AR's in .243, no .270 though.
Uncle Giggles is offline   Reply With Quote
Old 09-05-2008, 08:41 AM   #8
XDTalk 5K Member
 
gsh341's Avatar
 
Member #: 4352
Join Date: Oct 2004
Location: Sioux Falls, SD
Posts: 9,327
Quote:
Originally Posted by Reload 02 View Post
I don't "need" a .270. I am new to ARs and had heard there a lot of conversions and was curious. I love my new AR but I really like my 270 and was wondering ably it. What is the effective range on 223? And how is the drop past 100 yards? I just got me Stag 15.
Here you go.

Remington.com - Products - Ammunition - Ballistics

200 yds
.223 -2.3" / .243 -1.6" / .270 - 1.8"

300 yds
.223 -12.9" / .243 -8.8" / .270 -9.8"

There's lots of other calibers and numbers here as well as free ballistics software.

Enjoy!
__________________
"For those of us who exercised our privilege to serve our country, I can honestly say we did it proudly and shared a common bond of patriotism that those who were unwilling to answer our country's call will never understand or appreciate." - Dennis Foell
gsh341 is offline   Reply With Quote
Old 09-05-2008, 08:51 PM   #9
XDTalk 500 Member
 
Sharkbait's Avatar
 
Member #: 5448
Join Date: Feb 2005
Posts: 568
Quote:
Originally Posted by Reload 02 View Post
What is the effective range on 223? And how is the drop past 100 yards? I just got me Stag 15.
NRA and CMP competitions are regularly won at ranges out to 1k yards with the .223 round. If you want to punch paper the .223 is effective out past 1k yards, putting game (or a person) down with a .223 varies depending on a whole lot of factors such as bullet weight or your intended target. Effective range has many variables andif you ask 10 shooters what constitutes effective range you will get 10 different answers. The easy one is paper punching and you can do it all day long with the right upper assembly.
__________________
Red Ryder BB Gun
Tom Mix pocket Knife
A Bad Attitude
A Seriously Disgruntled Wife
Sharkbait is offline   Reply With Quote
Old 09-06-2008, 01:07 AM   #10
Old Timer
 
rykdawgg6601's Avatar
 
Member #: 17933
Join Date: May 2007
Location: Blackhawk County
Posts: 931
I've been doing some research on my own first build and came across this

Olympic Arms, Inc. - AR-15 Conversion Units

and this page has some interesting info for debate/thought.

.243 WSSM The Long-Awaited 6mm "Answer"?

Hope they help.

Ryk
__________________
.... If you can't feed your own children, you don't invite more people to the dinner table.

Music moves me. Unfortunately it moves me ugly.
rykdawgg6601 is offline   Reply With Quote
Reply

Lower Navigation
Go Back   XDTalk Forums - Your XD/XD(m) Information Source! » Long Gun Talk » AR Talk


Search tags for this page

.270 ar

,

.270 ar upper

,

270 ar

,
270 ar 15
,
270 ar 15 upper
,
270 ar-15 upper
,
270 cal. ar
,
270 upper
,
270 wsm ar upper
,
ar 15 270 caliber
,
ar 15 270 upper
,
ar in 270
,
ar in 270 caliber
,
ar-10 270
,
ar-15 270
,
is there a .270 variant for the ar15 rifle
Click on a term to search for related topics.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


LinkBacks (?)
LinkBack to this Thread: http://www.xdtalk.com/forums/ar-talk/82506-ar15-270-conversion.html
Posted By For Type Date
ar-15 270 caliber This thread Refback 02-27-2013 09:57 PM
AR caliber question - Pirate4x4.Com Bulletin Board This thread Refback 09-09-2009 07:00 AM
AR caliber question - Pirate4x4.Com Bulletin Board This thread Refback 09-09-2009 02:14 AM