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 02-27-2013, 01:19   #1
brausso
Senior Member
 
brausso's Avatar
 
Join Date: Mar 2010
Location: Puget Sound
Posts: 1,932
SBR 10.5, 11.5, or 12.5?

Just picked up an LMT lower today and am sending in my form 1 for my stamp. This is my first go at an SBR. This rifle would be used strictly for range (200 yards or less) and home defense. I have AR's in 16 and 14.5 (pinned) currently.

I am leaning towards the 10.5 simply because if I'm going to go short, I want to go short. I like this length for cqb.

What do you recommend and why?
brausso is offline   Reply With Quote
Old 02-27-2013, 01:24   #2
DrtyHarry
Senior Member
 
DrtyHarry's Avatar
 
Join Date: Sep 2007
Location: Vermont
Posts: 1,103
What caliber?



DH
__________________
ΜΟΛΩΝ ΛΑΒE
"Chance favors the prepared mind." - Louis Pasteur
DrtyHarry is offline   Reply With Quote
Old 02-27-2013, 01:28   #3
brausso
Senior Member
 
brausso's Avatar
 
Join Date: Mar 2010
Location: Puget Sound
Posts: 1,932
Quote:
Originally Posted by drtyharry View Post
what caliber?



Dh
223/556
brausso is offline   Reply With Quote
Old 02-27-2013, 01:41   #4
DrtyHarry
Senior Member
 
DrtyHarry's Avatar
 
Join Date: Sep 2007
Location: Vermont
Posts: 1,103
Do you plan on suppressing it? I asked the same question a while back when looking into a SBR and this is the best answer I got.

If you are really going to do it, the 12.5" is probably the best compromise in terms of reliability, handy size, and decent velocity. It can be had in piston or DI. Another poster said you don't gain anything from a piston...not true. The pistons actually shine in an SBR more so than in a full size configuration.

There are always trade-offs. Are you going to suppress the gun? Important question. The piston will definitely make life easier if going suppressed either way. Downside- pistons tend to have a bit more recoil.



DH
__________________
ΜΟΛΩΝ ΛΑΒE
"Chance favors the prepared mind." - Louis Pasteur
DrtyHarry is offline   Reply With Quote
Old 02-27-2013, 01:51   #5
AK_Stick
AAAMAD
 
AK_Stick's Avatar
 
Join Date: Jan 2004
Location: Alaska, again (for now)
Posts: 20,975
Send a message via AIM to AK_Stick Send a message via Yahoo to AK_Stick
Personally, with a 5.56, I'd never go back to a 10.5


If I ever buy another SBR, it'll be a 11.5 or 12.5.


Short is cool, but you just give up too much range and performance with the 7.5-10.5 inch tubes.

Now a 6.8, or 300 BLK I'd go to 10.5 in a heartbeat.
__________________
Quote:
Thomas Paine:

"If there must be trouble, let it be in my day, that my children may have peace"
AK_Stick is offline   Reply With Quote
Old 02-27-2013, 02:34   #6
MrMurphy
Lifetime Membership
*********
 
MrMurphy's Avatar
 
Join Date: Jan 2001
Location: Buried in the X-files
Posts: 31,706
What stick said.

Anything under 12" in a AR tends to get a little funky for truly reliable performance.

I've got enough time on a variety of SBRs with free ammo to know i'll personally never go under 12" unless it was issued.
__________________
"And Shepherds we shall be. For thee, my Lord for thee. Power hath descended forth from thy hand, that our feet may swiftly carry out thy command. So we shall flow a river forth to thee and teeming with souls shall it ever be. In nomine Patris, et fili, et Spiritus Sancti. Amen."
MrMurphy is offline   Reply With Quote
Old 02-27-2013, 05:30   #7
KalashniKEV
Senior Member
 
KalashniKEV's Avatar
 
Join Date: Sep 2003
Location: NoVA
Posts: 5,790
12.5" gives you the best feel, best reliability, and good velocity.

Black Rifle Forum

10.3/5" and 11.5" I can barely feel the difference without looking at the barrel- and the jump in reliability between 10.5" and 11.5" is real.
KalashniKEV is offline   Reply With Quote
Old 02-27-2013, 05:35   #8
kingdong
Senior Member
 
kingdong's Avatar
 
Join Date: Jul 2011
Posts: 105
12.5 any day. Shoot them lots and you'll see.

Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
__________________
|[(OO[_______R/T_]OO) ]|
kingdong is offline   Reply With Quote
Old 02-27-2013, 07:21   #9
utah
Senior Member
 
utah's Avatar
 
Join Date: Oct 2002
Location: Virginia
Posts: 729
Have an M16 with 10.5 223 and 9mm upper and neither has failed to run at anytime...Beta mag dumps included. My opinion...go 10.5".
__________________
"My fellow Americans, I am pleased to tell you I just signed legislation which outlaws Russia forever. The bombing will begin in five minutes."
(Ronald Reagan 11 August 1984)
utah is offline   Reply With Quote
Old 02-27-2013, 07:30   #10
Keyhole
Senior Member
 
Keyhole's Avatar
 
Join Date: Dec 2005
Location: Houston, TX
Posts: 1,427
Quote:
Originally Posted by AK_Stick View Post
Short is cool, but you just give up too much range and performance with the 7.5-10.5 inch tubes.
My thoughts exactly. I just switched from a 7 to a 12.
__________________
G17, G19 RTF2G, G21C, G26, G30 & G34
NRA (Endowment), GSSF (Life), NRA Instructor, NRA CRSO, Glock Armorer, Texas CHL, IDPA (SO), ICORE, TSRA
Keyhole is offline   Reply With Quote
Old 02-27-2013, 09:39   #11
Travclem
Lifetime Membership
Badass Member
 
Travclem's Avatar
 
Join Date: Aug 2008
Location: Lubbock, TX
Posts: 6,719
I prefer 10.5" especially since you already have a 16" and a 14.5" carbine. The 12" is a good all around length but since this is a purpose built cqb gun, go short. A 10.5" rifle with most suppressors is the same length as a 16" carbine. Buy a quality upper like LMT or BCM and you should have no reliability issues.

LMT factory 10.5" SBR
Black Rifle Forum

ETA: I've only put 1,200 rounds through this rifle, but I have had 0 failures.
__________________
Sent from a payphone in a whorehouse in Mexico.
__________________

Last edited by Travclem; 02-28-2013 at 06:43..
Travclem is offline   Reply With Quote
Old 02-27-2013, 17:33   #12
txleapd
Hook 'Em Up
 
txleapd's Avatar
 
Join Date: Aug 2004
Location: TX
Posts: 6,230
I have an LMT 10.5 also. It's my work gun that I use for warrant services, building searches, room clearing, etc...

I went with a 10.5 specifically because it is mainly for CQB type stuff. Before this rifle I used an issued 14.5 rifle, and the difference is huge. All of our SWAT entry guys are running 10.5 rifles too.

My advice is this.... If you are looking for a CQB gun, get a CQB gun. If you were wanting an all around type rifle, I would agree with going 12-12.5, but you're talking CQB. Use the right tool for the job. You wouldn't want to use a screwdriver if you need a hammer. It can be done, but not nearly as well.

As far as reliability goes, a quality gun (built that way from the get go) will run.

Since you're talking CQB, the barrel length won't effect ballistics enough to matter at the distances you intend to use it. I hope you don't plan on 200+ yards shots in CQB. You've got other rifles for that.

M2CW




Posted using Outdoor Hub Campfire
__________________
1911 Club #75
Kahr Club #286
Lone Star Glockers #919


"A fear of weapons is a sign of retarded sexual and emotional maturity” Sigmund Freud
txleapd is offline   Reply With Quote
Old 02-27-2013, 18:43   #13
Big Bird
NRA Life Member
 
Big Bird's Avatar
 
Join Date: Aug 2003
Posts: 10,691
I have a 10.5" LMT upper SBR. I have no issues. When I first got it it short stroked. Called LMT and turns out I was using a H2 buffer and they recommend a Standard Carbine Buffer with their upper. Made the switch to the Std buffer and its been flawless over 1,000 rounds since.

You won't have issues with ammunition terminal performance inside of about 120 yards with an SBR. Beyond 175 yards all guns--even a 20" rifle drops below the velocity required for M193 or M855 to fragment in tissue. Other ammunition may do better.
__________________
Big Bird,

“Est Nulla Via Invia Virute”
Big Bird is online now   Reply With Quote
Old 02-27-2013, 20:32   #14
Mayhem like Me
Semper Paratus
 
Mayhem like Me's Avatar
 
Join Date: Mar 2001
Posts: 16,385
Blog Entries: 3
My 10.5 piston runs 100% so does my DI Colt. Build what you want .

10.5 is a great size for a dedicated entry gun. I like 12.5 as a patrol rifle since it gives a little more range and is managable in CQB.
__________________
How do you establish intent?
Well when a naked man is chasing a woman down an alley with a butcher knife and a hard on, I figure he's not collecting for the red cross...Inspector H. Callahan
Mayhem like Me is offline   Reply With Quote
Old 02-27-2013, 20:44   #15
WoodenPlank
Who?
 
WoodenPlank's Avatar
 
Join Date: May 2010
Location: NW Florida
Posts: 7,812
I have a 10.5", and I have been very happy with it. My LMT upper is easily minute-of-man accurate at 300 yards (even with crappy ammo and nothing more than an Aimpoint), and has been boringly reliable with a BCM bolt group and H2 buffer.

If I had to do it all over again, though, I probably would have gone with 11.5" (Factory Colt Commando) for the slight increase in velocity and better reliability.
__________________
Never argue with an idiot. They will drag you down to their level and beat you with experience.
WoodenPlank is offline   Reply With Quote
Old 02-27-2013, 20:52   #16
mjkeat
Senior Member
 
Join Date: Jun 2009
Location: Midwest
Posts: 3,450
I've only ran a couple SBRs and the 12.5" versions seemed to work more reliably.
mjkeat is offline   Reply With Quote
Old 02-28-2013, 00:16   #17
Cole125
Silver Membership
Senior Member
 
Cole125's Avatar
 
Join Date: Apr 2008
Location: Far West, USA
Posts: 7,594
If you going to all the trouble to get a SBR, get the 10.5!
Cole125 is offline   Reply With Quote
Old 02-28-2013, 00:24   #18
Clusterfrack
Senior Member
 
Clusterfrack's Avatar
 
Join Date: Apr 2012
Location: Pacific NW
Posts: 2,409
Like Woodenplank, my LMT Mk18 10.5" has been 100% reliable, both suppressed and unsuppressed. I've done just fine at 300 yards with it too.
Black Rifle Forum
__________________
"I have one simple request... and that is to have sharks with fricking laser beams attached to their heads!"--Dr. Evil
Clusterfrack is offline   Reply With Quote
Old 02-28-2013, 01:07   #19
AK_Stick
AAAMAD
 
AK_Stick's Avatar
 
Join Date: Jan 2004
Location: Alaska, again (for now)
Posts: 20,975
Send a message via AIM to AK_Stick Send a message via Yahoo to AK_Stick
I never had any issues reliability wise with my rifles.


I simply wanted the increased velocity and energy of the longer barrel. (And since I can take my upper to work with me, possible real life usage weighed in)
__________________
Quote:
Thomas Paine:

"If there must be trouble, let it be in my day, that my children may have peace"
AK_Stick is offline   Reply With Quote
Old 02-28-2013, 05:32   #20
txleapd
Hook 'Em Up
 
txleapd's Avatar
 
Join Date: Aug 2004
Location: TX
Posts: 6,230
Quote:
Originally Posted by Mayhem like Me View Post
I like 12.5 as a patrol rifle since it gives a little more range and is manageable in CQB.
If I were king, all of our patrol rifles would have 12.5 barrels.



Posted using Outdoor Hub Campfire
__________________
1911 Club #75
Kahr Club #286
Lone Star Glockers #919


"A fear of weapons is a sign of retarded sexual and emotional maturity” Sigmund Freud
txleapd 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 16:11.




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


Users Currently Online: 1,133
281 Members
852 Guests

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