are there issues mating a carbine AR lower to a 20 or longer upper - THR

Go Back   THR > Tools and Technologies > Rifle Country

Welcome to THR
You are currently viewing our site as a guest which gives you limited access to view most discussions, articles and access our other FREE features. By joining our free community you will have, access to post topics, communicate privately with other members (PM), respond to polls, and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please visit the help section.

Thread Tools
Old May 4, 2015, 12:08 AM   #1
Join Date: April 8, 2011
Posts: 229
are there issues mating a carbine AR lower to a 20 or longer upper

I'm interested in getting a 20 inch ar,of course getting an upper would be cheaper. Any issues with a carbine buffer and a rifle length gas system?
roval is offline  
Old May 4, 2015, 12:20 AM   #2
Join Date: March 19, 2006
Posts: 11,232
Functionally, no: The Canadians did it as the C7A2. The only downside is they feel heavier than they actually are to many users since such a large percentage of the is so far forward.
ugaarguy is offline  
Old May 4, 2015, 12:49 AM   #3
Join Date: March 9, 2006
Location: Northwest Washington
Posts: 3,164
It will work. I just built an 18" with rifle length gas. Using an H buffer this rifle is smooth as silk. Much smoother shooting than my carbine. Yes, weight/balance can be an issue, depending on the barrel profile.
Jackal is offline  
Old May 5, 2015, 02:17 PM   #4
Join Date: November 13, 2010
Location: Oklahoma City
Posts: 2,718
No problem whatsoever. I think thhe balance issue is overblown. I can vouch that it isn't an issue with a gov't profile (or lighter) barrel. If you have an HBAR, yeah, it's gonna be front-heavy... But those are front heavy regardless of what stock you use.
This motto may adorn their tombs,
(Let tyrants come and view)
“We rather seek these silent rooms
Than live as slaves to you”
-- Lemuel Haynes, 1775

henschman is offline  
Old May 5, 2015, 06:33 PM   #5
Join Date: June 7, 2006
Location: Texan by birth, in Colorado cause I hate humidity
Posts: 8,791
I run a 20" barrel on my AR with a collapsible stock and carbine buffer with no issues at all.
I step out of the shower wearing nothing but an AR-15 and a frown.

Superior gear will never make up for a lack of training or attitude.

When your time comes to die, be not like those whose hearts are filled with fear of death, so that when their time comes they weep and pray for a little more time to live their lives over again in a different way. Sing your death song, and die like a hero going home.- Chief Tecumseh
Robert is offline  
Old May 5, 2015, 07:03 PM   #6
loose noose
Join Date: February 22, 2012
Location: Southern Nevada
Posts: 2,051
Note, I recently put a 20" SS Bull barrel on my A-1 stock, made the whole gun considerably a lot heavier than the standard carbine was with the 16" military barrel, but it is one heck of an accurate bench rest rifle.
loose noose is offline  

Thread Tools

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 -4. The time now is 12:10 AM.

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
vBulletin Optimisation by vB Optimise.
This site, its contents, Shooting Reviews, and its contents are Copyright (c) 2010-2013 Firearms Forum, Inc.
Although The High Road has attempted to provide accurate information on the forum, The High Road assumes no responsibility for the accuracy of the information. All information is provided "as is" with all faults without warranty of any kind, either express or implied. Neither The High Road nor any of its directors, members, managers, employees, agents, vendors, or suppliers will be liable for any direct, indirect, general, bodily injury, compensatory, special, punitive, consequential, or incidental damages including, without limitation, lost profits or revenues, costs of replacement goods, loss or damage to data arising out of the use or inability to use this forum or any services associated with this forum, or damages from the use of or reliance on the information present on this forum, even if you have been advised of the possibility of such damages.