Home Forums Classifieds Blogs Today's Posts Search Social Groups



  
SIGN-UP
Notices

Glock Talk
Welcome To The Glock Talk Forums.

 
  
Reply
 
Thread Tools Display Modes
Old 10-02-2012, 07:32   #1
Beware Owner
NOT a victim.
 
Beware Owner's Avatar
 
Join Date: Oct 2007
Posts: 9,144
6.8 to 5.56 Conversion

What do you guys recommend as far as the BCG and bbl? I'm not going to swap out the whole upper unles it'd cost about the same to change the internals. I know to go with PMAGS...
__________________
Free men have arms; slaves do not. Tyrants mistrust the people, hence they deprive them of arms.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Beware Owner is offline   Reply With Quote
Old 10-02-2012, 07:45   #2
rockapede
Senior Member
 
rockapede's Avatar
 
Join Date: Sep 2009
Posts: 1,303
Quote:
Originally Posted by Beware Owner View Post
What do you guys recommend as far as the BCG and bbl? I'm not going to swap out the whole upper unles it'd cost about the same to change the internals. I know to go with PMAGS...
If you're not looking to spend a ton Palmetto is a good place to start. If you can spend a little more, BCM is where it's at. If it were me, I'd probably get Palmetto barrel and a BCM BCG.
__________________
“Do you like being a cop?"
"I love it, when it doesn't suck, sir.”

-Edward Conlon
rockapede is offline   Reply With Quote
Old 10-02-2012, 08:20   #3
Beware Owner
NOT a victim.
 
Beware Owner's Avatar
 
Join Date: Oct 2007
Posts: 9,144
I'm not too sure about the twist rate, is 1:7 the most common? Is it used for the heavier bullets?
__________________
Free men have arms; slaves do not. Tyrants mistrust the people, hence they deprive them of arms.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Beware Owner is offline   Reply With Quote
Old 10-02-2012, 08:37   #4
Big Bird
NRA Life Member
 
Big Bird's Avatar
 
Join Date: Aug 2003
Posts: 10,697
A stripped PSA or Spikes barrel (both are FN) will run about $160-200 depending on your flavor. 1-7 is standard USGI twist but there are some advantages with 1-8 and 1-9 especially if you run a lot of 55 grain M193. If you want a barrel with a FSB you'll need to add about $50 to that price.

All you need is a new bolt not an entire BCG. So about $60 for the bolt.

And someone to screw the barrel on for you...
__________________
Big Bird,

“Est Nulla Via Invia Virute”
Big Bird is offline   Reply With Quote
Old 10-02-2012, 09:26   #5
rockapede
Senior Member
 
rockapede's Avatar
 
Join Date: Sep 2009
Posts: 1,303
Quote:
Originally Posted by Beware Owner View Post
I'm not too sure about the twist rate, is 1:7 the most common? Is it used for the heavier bullets?
1 in 7 will be good for anything from about 50 grain on up. Some of the lighter constructed bullets may come apart out of a fast barrel like that, but I've never had an issue with any of the 55gr stuff I've shot. Accuracy may or may not be as good with the lighter bullets as with heavier, as well.
__________________
“Do you like being a cop?"
"I love it, when it doesn't suck, sir.”

-Edward Conlon
rockapede is offline   Reply With Quote
Old 10-02-2012, 09:28   #6
rockapede
Senior Member
 
rockapede's Avatar
 
Join Date: Sep 2009
Posts: 1,303
Oh, and FYI, P-Mags are great but the problems with quality GI mags are greatly exaggerated.
__________________
“Do you like being a cop?"
"I love it, when it doesn't suck, sir.”

-Edward Conlon
rockapede is offline   Reply With Quote
Old 10-02-2012, 09:39   #7
Beware Owner
NOT a victim.
 
Beware Owner's Avatar
 
Join Date: Oct 2007
Posts: 9,144
Seems like you can't find a goog upper for under $700!
__________________
Free men have arms; slaves do not. Tyrants mistrust the people, hence they deprive them of arms.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Beware Owner is offline   Reply With Quote
Old 10-02-2012, 09:48   #8
rockapede
Senior Member
 
rockapede's Avatar
 
Join Date: Sep 2009
Posts: 1,303
Quote:
Originally Posted by Beware Owner View Post
Seems like you can't find a goog upper for under $700!
Sure you can, depending on what you want. What features are you looking for?
__________________
“Do you like being a cop?"
"I love it, when it doesn't suck, sir.”

-Edward Conlon
rockapede is offline   Reply With Quote
Old 10-02-2012, 11:37   #9
DougW
Native Texan
 
DougW's Avatar
 
Join Date: May 2003
Location: North Texas
Posts: 341
I just converted one of my rifles from 5.56 to 6.8 with a Palmetto barrel and DPMS bolt. Barrel changes are easy for me because I have the proper tools, so the total conversion took less than 30 minutes.

Pmags are great. I have 2 kids deployed right now in Kandahar using Pmags daily. But, there are a lot of good mags out there.

1 in 7 is what the .mil uses. Good up to 62gr, possibly (depending on your barrel) 68gr. All my 5.56 rifles are 1 in 9.
__________________
Enfield .303 Accumulator/Collector

Proud Father of Two US Army Soldiers

Last edited by DougW; 10-02-2012 at 20:23..
DougW is offline   Reply With Quote
Old 10-02-2012, 11:46   #10
rockapede
Senior Member
 
rockapede's Avatar
 
Join Date: Sep 2009
Posts: 1,303
Quote:
Originally Posted by DougW View Post
I just converted one of my rifles from 5.56 to 6.8 with a Palmetto barrel and DPMS bolt. Barrel changes are easy for me because I have the proper tools, so the total conversion took less than 30 minutes.

Pmags are great. I have 2 deployed right now using Pmags daily. But, there are a lot of good mags out there.

1 in 7 is what the .mil uses. Good up to 62gr, possibly (depending on your barrel) 68gr. All my 5.56 rifles are 1 in 9.
1 in 7 is fine for up to 80gr or greater, generally.
__________________
“Do you like being a cop?"
"I love it, when it doesn't suck, sir.”

-Edward Conlon
rockapede is offline   Reply With Quote
Old 10-02-2012, 11:56   #11
Beware Owner
NOT a victim.
 
Beware Owner's Avatar
 
Join Date: Oct 2007
Posts: 9,144
Quote:
Originally Posted by rockapede View Post
Sure you can, depending on what you want. What features are you looking for?
Flip up front sight, M4 configuration, removable handle. Wouldn't mind a free floater, but that is what racks up the price, I think.

Quote:
Originally Posted by DougW View Post
I just converted one of my rifles from 5.56 to 6.8 with a Palmetto barrel and DPMS bolt. Barrel changes are easy for me because I have the proper tools, so the total conversion took less than 30 minutes.

Pmags are great. I have 2 deployed right now using Pmags daily. But, there are a lot of good mags out there.

1 in 7 is what the .mil uses. Good up to 62gr, possibly (depending on your barrel) 68gr. All my 5.56 rifles are 1 in 9.
I want to shoot both calibers frequently, looks like getting a dedicated upper is the best solution, would you think?

Quote:
Originally Posted by rockapede View Post
1 in 7 is fine for up to 80gr or greater, generally.
Would 1 in 9 not be good for lighter loads?
__________________
Free men have arms; slaves do not. Tyrants mistrust the people, hence they deprive them of arms.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Beware Owner is offline   Reply With Quote
Old 10-02-2012, 12:11   #12
Big Bird
NRA Life Member
 
Big Bird's Avatar
 
Join Date: Aug 2003
Posts: 10,697
Dedicated upper would be my choice and just swap out bolt heads. You can buy Stag uppers less a bolt carrier for around $480 and they are fine.
__________________
Big Bird,

“Est Nulla Via Invia Virute”
Big Bird is offline   Reply With Quote
Old 10-02-2012, 12:12   #13
m2hmghb
Senior Member
 
Join Date: May 2002
Location: Livin in the country of NJ
Posts: 12,347


Quote:
Originally Posted by Beware Owner View Post
Flip up front sight, M4 configuration, removable handle. Wouldn't mind a free floater, but that is what racks up the price, I think.



I want to shoot both calibers frequently, looks like getting a dedicated upper is the best solution, would you think?



Would 1 in 9 not be good for lighter loads?
The faster the twist the heavier the bullet it will support in .223. A 1-9 will work with around 69-75 grain bullets, but the 1-7 will work up to 80 grains and above. The 1-9 works well with the 55 grain rounds as well as the heavier 69 grains(some barrels will shoot 75 grains some won't, the 1-7 will shoot 75 grains but the 55 grainers aren't as accurate).

If you don't have the tools on hand to do a barrel change, which includes a torque wrench, vise, clamp system, and barrel nut wrench you'd be better off with the second upper.
__________________
Here's a toast to our wives and to the women we loved. <pause> May they never meet.

The M1 Garand rifle is the best battle implement ever devised by man.

Last edited by m2hmghb; 10-02-2012 at 12:13..
m2hmghb is offline   Reply With Quote
Old 10-02-2012, 12:14   #14
rockapede
Senior Member
 
rockapede's Avatar
 
Join Date: Sep 2009
Posts: 1,303
Quote:
Originally Posted by Beware Owner View Post
Flip up front sight, M4 configuration, removable handle. Wouldn't mind a free floater, but that is what racks up the price, I think.



I want to shoot both calibers frequently, looks like getting a dedicated upper is the best solution, would you think?



Would 1 in 9 not be good for lighter loads?
1 in 9 would be fine for lighter loads, so long as you realize it limits you more than likely to 69gr and under. If you have no intention of ever shooting heavier bullets then don't worry about it. If you want to shoot both calibers frequently, another upper is definitely the way to go. Check out Palmetto State Armory under barreled upper assemblies section. You should be able to get what you want in a basic upper for south of $500, with the possible exception of the folding front sight as most of their uppers (and most of anyone's uppers) come with forged front sight bases.
__________________
“Do you like being a cop?"
"I love it, when it doesn't suck, sir.”

-Edward Conlon
rockapede is offline   Reply With Quote
Old 10-02-2012, 12:58   #15
Beware Owner
NOT a victim.
 
Beware Owner's Avatar
 
Join Date: Oct 2007
Posts: 9,144
Quote:
Originally Posted by Big Bird View Post
Dedicated upper would be my choice and just swap out bolt heads. You can buy Stag uppers less a bolt carrier for around $480 and they are fine.
Not bad! I'll definitely look into that.

Quote:
Originally Posted by m2hmghb View Post
The faster the twist the heavier the bullet it will support in .223. A 1-9 will work with around 69-75 grain bullets, but the 1-7 will work up to 80 grains and above. The 1-9 works well with the 55 grain rounds as well as the heavier 69 grains(some barrels will shoot 75 grains some won't, the 1-7 will shoot 75 grains but the 55 grainers aren't as accurate).
What do you prefer and why?

Quote:
Originally Posted by m2hmghb View Post
If you don't have the tools on hand to do a barrel change, which includes a torque wrench, vise, clamp system, and barrel nut wrench you'd be better off with the second upper.
I just saw that, nothing quick about just changing the barrel. Ugh.
__________________
Free men have arms; slaves do not. Tyrants mistrust the people, hence they deprive them of arms.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Beware Owner is offline   Reply With Quote
Old 10-02-2012, 13:09   #16
Beware Owner
NOT a victim.
 
Beware Owner's Avatar
 
Join Date: Oct 2007
Posts: 9,144
What are your preferred twist rates and bullet weights?
__________________
Free men have arms; slaves do not. Tyrants mistrust the people, hence they deprive them of arms.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Beware Owner is offline   Reply With Quote
Old 10-02-2012, 13:19   #17
rockapede
Senior Member
 
rockapede's Avatar
 
Join Date: Sep 2009
Posts: 1,303
Quote:
Originally Posted by Beware Owner View Post
What are your preferred twist rates and bullet weights?
I like 1 in 7 because I shoot anything from 55gr to 77gr. I practice mostly with 55gr and don't have issues with accuracy serious enough to make me wish I had a slower twist barrel.
__________________
“Do you like being a cop?"
"I love it, when it doesn't suck, sir.”

-Edward Conlon
rockapede is offline   Reply With Quote
Old 10-02-2012, 13:43   #18
m2hmghb
Senior Member
 
Join Date: May 2002
Location: Livin in the country of NJ
Posts: 12,347


I like 1-9, I don't shoot 77 grain rounds and most of the practice fodder is M193(55 grain FMJ) or 69 grain match rounds. Then you get into the chrome lined or not lined debate.
__________________
Here's a toast to our wives and to the women we loved. <pause> May they never meet.

The M1 Garand rifle is the best battle implement ever devised by man.
m2hmghb is offline   Reply With Quote
Old 10-02-2012, 16:24   #19
Trey83
Senior Member
 
Trey83's Avatar
 
Join Date: Feb 2010
Posts: 1,527
Quote:
Originally Posted by Beware Owner View Post
I want to shoot both calibers frequently, looks like getting a dedicated upper is the best solution, would you think?
You should definitely get a dedicate upper if you are going to be swapping frequently.
__________________
Act as if what you do makes a difference. It does.
Trey83 is offline   Reply With Quote
Old 10-02-2012, 17:09   #20
faawrenchbndr
CLM Number 281
The Dude Abides
 
faawrenchbndr's Avatar
 
Join Date: Nov 2005
Location: east of East St. Louis
Posts: 34,302
Quote:
Originally Posted by Beware Owner View Post
Flip up front sight, M4 configuration, removable handle. Wouldn't mind a free floater, but that is what racks up the price, I think.
Would be better off ordering an entire upper
faawrenchbndr is offline   Reply With Quote

 
  
Reply

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

Forum Jump




All times are GMT -6. The time now is 11:03.




Homepage
FAQ
Forums
Calendar
Advertise
Gallery
GT Wiki
GT Blogs
Social Groups
Classifieds


Users Currently Online: 918
264 Members
654 Guests

Most users ever online: 2,672
Aug 11, 2014 at 2:31