Calguns.net  

Home My iTrader Join the NRA Donate to CGSSA Sponsors CGN Google Search
CA Semiauto Ban(AW)ID Flowchart CA Handgun Ban ID Flowchart CA Shotgun Ban ID Flowchart
Go Back   Calguns.net > FIREARMS DISCUSSIONS > Centerfire Rifles - Semiautomatic or Gas Operated
Register FAQ Members List Calendar Mark Forums Read

Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

Reply
 
Thread Tools Display Modes
  #1  
Old 09-22-2010, 2:07 PM
ExtremeX's Avatar
ExtremeX ExtremeX is online now
Calguns Addict
 
Join Date: Sep 2010
Location: SoCal
Posts: 6,448
iTrader: 41 / 100%
Default AR Uppers - Pistol uppers vs SBR uppers

Ive been looking to get a AR pistol, but see anything from 7.5" to 11" uppers.

Is there any difference between a pistol upper and an SBR upper?

What would you recommend as the minimum length for a 5.56 cartridge? From what I read, you have a lot to loose in terms of peformance shorter you go.

Whats the best length for a Pistol upper without getting into the SBR type of lengths.
Reply With Quote
  #2  
Old 09-22-2010, 2:11 PM
gun toting monkeyboy's Avatar
gun toting monkeyboy gun toting monkeyboy is offline
Calguns Addict
 
Join Date: Aug 2008
Location: San Diego (more or less)
Posts: 6,553
iTrader: 2 / 100%
Default

There is no difference in the uppers. It is simply a matter of which lower you put it on. Any barrel under 16" long can't be put on anything with a rifle stock without going through the ATF and their SBR process. Which is exceedingly unlikely to happen here in CA. If the barrel is under 16" here in California, you have 2 options. 1) Attach a flashhider/muzzle brake to the end of it and have it permanantly mounted to the barrel to make the overall length greater than 16". Or 2) Mount the upper on a legal pistol lower, and call the whole thing a pistol.

As for what length, that is purely up to you. The more you shorten the barrel, the more power you lose. 11.5" seems to be the norm, but there are versions out there with 6-8" barrels that some people like. I went with 10.5", and it is loud, with a huge fireball. I have no idea what the velocity is like. It is fun to shoot, but not especially useful.
__________________
Quote:
Originally Posted by aplinker View Post
It's OK not to post when you have no clue what you're talking about.

Last edited by gun toting monkeyboy; 09-22-2010 at 2:29 PM..
Reply With Quote
  #3  
Old 09-22-2010, 2:22 PM
wash's Avatar
wash wash is offline
Calguns Addict
 
Join Date: Aug 2007
Location: sillycon valley
Posts: 9,020
iTrader: 12 / 100%
Blog Entries: 13
Default

Some 10.5" and 11.5" uppers are called commando length and use a carbine gas system.

Shorter barrels usually have a pistol gas system that is shorter than the carbine setup.
__________________

Quote:
Originally Posted by oaklander
Dear Kevin,

You suck!!! Your are wrong!!! Stop it!!!
Proud CGF and CGN donor. SAF life member. Former CRPA member. Gpal beta tester (it didn't work). NRA member.
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 -8. The time now is 4:12 PM.




Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Proudly hosted by GeoVario the Premier 2A host.
Calguns.net, the 'Calguns' name and all associated variants and logos are ® Trademark and © Copyright 2002-2016, Calguns.net an Incorporated Company All Rights Reserved.