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 08-06-2016, 7:40 PM
Nguyen's Avatar
Nguyen Nguyen is offline
Veteran Member
 
Join Date: Apr 2013
Location: Orange County
Posts: 3,037
iTrader: 104 / 100%
Default 80% uppers either not up to spec or does not like faxon barrels

Finish building my ar today and got constant ftf... This doesn't look right, right?





This is my first billet upper i ever messed around with.. Unless this is normal for billet uppers.

Here is the exact barrel on my anderson forged. The ramp sits flush and smooth like a baby's butt.

__________________


Quote:
"The right of the people to keep and bear arms shall not be infringed. A well regulated militia, composed of the body of the people, trained to arms, is the best and most natural defense of a free country."
- Dianne Feinstein
Reply With Quote
  #2  
Old 08-06-2016, 7:43 PM
BigBamBoo's Avatar
BigBamBoo BigBamBoo is offline
Calguns Addict
 
Join Date: Apr 2008
Location: *NDBBM*
Posts: 5,127
iTrader: 51 / 100%
Default

Did you try a different mag?


.
__________________
Bring hay for my horse....wine for my men....and mud for my turtle!

What do you hear ???...... Nothing but the rain. Well grab your gun and bring in the cat.

"A fear of weapons is a sign of retarded sexual and emotional maturity."
- Sigmund Freud

Quote:
Originally Posted by ar15barrels View Post
It makes it bigger and longer.
Reply With Quote
  #3  
Old 08-06-2016, 7:49 PM
Drew Eckhardt Drew Eckhardt is offline
Senior Member
 
Join Date: Apr 2010
Location: Silicon Valley, CA
Posts: 1,900
iTrader: 2 / 100%
Default

Quote:
Originally Posted by Nguyen View Post
Finish building my ar today and got constant ftf... This doesn't look right, right?
That looks like a M4 upper with a traditional barrel extension which is not the happiest combination, although I'd try another magazine as BigBamBoo suggested.

The M4 feed ramps were added to accommodate the bolt cycling faster from higher pressures due to the shorter gas system on the M4 carbine. With normal speed from gas port diameter/gas port location/buffer weight, bullets should be hitting the feed ramps in the extension.


Last edited by Drew Eckhardt; 08-06-2016 at 7:53 PM..
Reply With Quote
  #4  
Old 08-06-2016, 7:50 PM
Mossy Man's Avatar
Mossy Man Mossy Man is offline
Calguns Addict
 
Join Date: Jun 2011
Location: Sacramento
Posts: 7,646
iTrader: 32 / 100%
Default

just dremel it out mang
Reply With Quote
  #5  
Old 08-06-2016, 7:56 PM
Nguyen's Avatar
Nguyen Nguyen is offline
Veteran Member
 
Join Date: Apr 2013
Location: Orange County
Posts: 3,037
iTrader: 104 / 100%
Default

Quote:
Originally Posted by BigBamBoo View Post
Did you try a different mag?


.
yeah i just hexmag and pmags same problem, homie.

Its cool tho. I'm gonna buy a anderson upper. I already contacted 80% and im currently waiting for their reply.
__________________


Quote:
"The right of the people to keep and bear arms shall not be infringed. A well regulated militia, composed of the body of the people, trained to arms, is the best and most natural defense of a free country."
- Dianne Feinstein
Reply With Quote
  #6  
Old 08-07-2016, 10:28 AM
adam6955 adam6955 is offline
Senior Member
 
Join Date: Nov 2013
Location: California
Posts: 581
iTrader: 10 / 100%
Default

Quote:
Originally Posted by Mossy Man View Post
just dremel it out mang
Truth!

After building AKs these threads are hilarious to me.
Reply With Quote
  #7  
Old 08-07-2016, 10:44 AM
dadler's Avatar
dadler dadler is offline
Member
 
Join Date: Dec 2015
Location: NorCal
Posts: 120
iTrader: 2 / 100%
Default

I suspect it's the upper.

Here is one of my Faxon barrels in a VLTOR MUR:

(picture isn't that great--sorry. But the feed ramps align perfectly, with no gaps or uneven edges)


Last edited by dadler; 08-07-2016 at 10:46 AM..
Reply With Quote
  #8  
Old 08-07-2016, 10:49 AM
Chewbaca's Avatar
Chewbaca Chewbaca is offline
Veteran Member
 
Join Date: Jul 2012
Location: bay area
Posts: 2,639
iTrader: 26 / 100%
Default

Look at your feed ramps bro ��������
Reply With Quote
  #9  
Old 08-07-2016, 10:51 AM
ScottsBad's Avatar
ScottsBad ScottsBad is offline
Progressives Suck!
CGN Contributor - Lifetime
 
Join Date: May 2009
Posts: 5,432
iTrader: 3 / 100%
Default

Looks like rifle vs. M4 ramps. I'm not even going to ask why you bought that receiver when there are so many cheap high quality upper receiver out there.
Reply With Quote
  #10  
Old 08-07-2016, 10:57 AM
ScottsBad's Avatar
ScottsBad ScottsBad is offline
Progressives Suck!
CGN Contributor - Lifetime
 
Join Date: May 2009
Posts: 5,432
iTrader: 3 / 100%
Default

Quote:
Originally Posted by dadler View Post
I suspect it's the upper.

Here is one of my Faxon barrels in a VLTOR MUR:

(picture isn't that great--sorry. But the feed ramps align perfectly, with no gaps or uneven edges)
Yeah, I have a couple of those MUR uppers, and they are sweeeeet. Not cheap though.

But I've also found the BCM forged uppers to be very high quality with very tight tolerances. I had to heat the uppers slightly to get the barrels in and the finish is beautiful.

Mega forged uppers, also very tight with nice finish.
Reply With Quote
  #11  
Old 08-07-2016, 11:05 AM
dadler's Avatar
dadler dadler is offline
Member
 
Join Date: Dec 2015
Location: NorCal
Posts: 120
iTrader: 2 / 100%
Default

Quote:
Originally Posted by ScottsBad View Post
Yeah, I have a couple of those MUR uppers, and they are sweeeeet. Not cheap though.

But I've also found the BCM forged uppers to be very high quality with very tight tolerances. I had to heat the uppers slightly to get the barrels in and the finish is beautiful.

Mega forged uppers, also very tight with nice finish.
<off topic>
Yeah agree on all fronts. This last batch I picked up 2x VLTOR MUR (I like them, but not a fan of the proprietary FA mounting system) and 5x forged Mega uppers. Prefer the megas, but the VLTOR have better surface finish.
</off topic>

Regardless, both types of upper match the feed ramps on the Faxon barrels (see, I got us back on topic!)
Reply With Quote
  #12  
Old 08-07-2016, 11:08 AM
Mossy Man's Avatar
Mossy Man Mossy Man is offline
Calguns Addict
 
Join Date: Jun 2011
Location: Sacramento
Posts: 7,646
iTrader: 32 / 100%
Default

Reply With Quote
  #13  
Old 08-07-2016, 11:25 AM
Nguyen's Avatar
Nguyen Nguyen is offline
Veteran Member
 
Join Date: Apr 2013
Location: Orange County
Posts: 3,037
iTrader: 104 / 100%
Default

Quote:
Originally Posted by ScottsBad View Post
Looks like rifle vs. M4 ramps. I'm not even going to ask why you bought that receiver when there are so many cheap high quality upper receiver out there.
I wanted it to match my lower... I just bought an andersons upper for RG and now the feed ramps good. I cycled using dummy rounds and none of them are getting stuck.
__________________


Quote:
"The right of the people to keep and bear arms shall not be infringed. A well regulated militia, composed of the body of the people, trained to arms, is the best and most natural defense of a free country."
- Dianne Feinstein
Reply With Quote
  #14  
Old 08-07-2016, 11:26 AM
Kwikvette's Avatar
Kwikvette Kwikvette is offline
Veteran Member
 
Join Date: Oct 2015
Location: Monterey County
Posts: 3,697
iTrader: 48 / 100%
Default

Dremel will solve your issue; go slow.
__________________
Quote:
Originally Posted by longrange1 View Post
my gun shoots better with shiny brass...plus not only does the shiny brass make me look like a pimp at the range if the sun catches it just right it blinds the guy next to me which improves my odds of winning the match.
Quote:
Originally Posted by XDJYo View Post
Full size. Stubbies are for sissies.
Reply With Quote
  #15  
Old 08-08-2016, 9:38 AM
FaxonFirearms's Avatar
FaxonFirearms FaxonFirearms is offline
Member
 
Join Date: Oct 2014
Location: Cincinnati, OH
Posts: 226
iTrader: 0 / 0%
Default

Glad to see other users assisting. While we cannot rule out a bad extenion, the photo looks like the ramps are not milled correctly. They are "fatter" than they should be.

We are always open for support. Send an e-mail if we can help!
__________________
QUALITY. INNOVATION. SERVICE.

The Director at Faxon Firearms. E-Mail me anytime: Nathan@faxonfirearms.com

"Manufacturing Strategic Solutions for Tactical Problems."
Reply With Quote
  #16  
Old 08-08-2016, 10:11 AM
Nguyen's Avatar
Nguyen Nguyen is offline
Veteran Member
 
Join Date: Apr 2013
Location: Orange County
Posts: 3,037
iTrader: 104 / 100%
Default

This is actually the second time I have problems with 80% arm's products. I had a lower from them which was out of spec. The bolt release was so sloppy it misses the magazine follower. So everytime the magazine runs empty it does not lock back. They did replace it for me and now it works. Now the upper i bought from is out of spec, haha. My luck...
__________________


Quote:
"The right of the people to keep and bear arms shall not be infringed. A well regulated militia, composed of the body of the people, trained to arms, is the best and most natural defense of a free country."
- Dianne Feinstein
Reply With Quote
  #17  
Old 08-08-2016, 10:13 AM
Nguyen's Avatar
Nguyen Nguyen is offline
Veteran Member
 
Join Date: Apr 2013
Location: Orange County
Posts: 3,037
iTrader: 104 / 100%
Default

Quote:
Originally Posted by FaxonFirearms View Post
Glad to see other users assisting. While we cannot rule out a bad extenion, the photo looks like the ramps are not milled correctly. They are "fatter" than they should be.

We are always open for support. Send an e-mail if we can help!
Yes the upper is out of spec. I purchased another anderson upper and I ran 300 rounds through it, no problems at all. Except for one of my 10/30 USGI mags didn't lock back all the way. Its very very old and the springs are just about done. Also the green followers didn't help either, haha.
__________________


Quote:
"The right of the people to keep and bear arms shall not be infringed. A well regulated militia, composed of the body of the people, trained to arms, is the best and most natural defense of a free country."
- Dianne Feinstein
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 5:18 PM.




Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, 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 2002-2020, Calguns.net an Incorporated Company All Rights Reserved.
All opinions, statements and remarks made by Calguns.net on this web site and elsewhere are solely attributable to Calguns.net.
Tactical Pants Tactical Boots Tactical Gear Military Boots 5.11 Tactical