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 03-26-2010, 9:00 PM
badicedog's Avatar
badicedog badicedog is offline
Veteran Member
 
Join Date: Jan 2008
Location: Los Alamitos
Posts: 2,941
iTrader: 67 / 99%
Default Help troubleshooting AR...

I recently built a new lower for my HK 416 upper. This is not my first build, second or third. I noticed when I attach an empty magazine and pull the charging handle, the bolt locks to the rear. If I shake the rifle, the bolt will unlock and spring forward(without pressing on the bolt release!). Any thoughts? All suggestions are welcome.
__________________
"Americans used to roar like lions for liberty;now we bleat like sheep for security."

~ Norman Vincent Peale
Reply With Quote
  #2  
Old 03-26-2010, 9:04 PM
technique's Avatar
technique technique is offline
I need a LIFE!!
 
Join Date: Jan 2008
Location: Idaho...free!
Posts: 10,400
iTrader: 76 / 100%
Default

What kinds of mags and how many different kinds have you tried?
__________________
Reply With Quote
  #3  
Old 03-26-2010, 9:11 PM
badicedog's Avatar
badicedog badicedog is offline
Veteran Member
 
Join Date: Jan 2008
Location: Los Alamitos
Posts: 2,941
iTrader: 67 / 99%
Default

pmags, I'll try usgi and hk mags tomorrow. Same build worked great with noveske lower. This lower is a POF gen 1
Reply With Quote
  #4  
Old 03-27-2010, 12:09 AM
Seesm's Avatar
Seesm Seesm is offline
Calguns Addict
 
Join Date: Nov 2008
Posts: 7,921
iTrader: 50 / 100%
Default

I have this problem with 2 of my many mags... never happen with the higher end ones so I just use them now...
__________________
Machining, Fabrication, Welding (All metals), Mini 14 / Mini 30 Magazine locks, AR15/M16/AR10 Sling loop plates, Muzzle brakes, Motorcycle parts, Bobcat tractor work.

DefenseIndustries.US
Auburn, CA
Reply With Quote
  #5  
Old 03-27-2010, 11:05 AM
badicedog's Avatar
badicedog badicedog is offline
Veteran Member
 
Join Date: Jan 2008
Location: Los Alamitos
Posts: 2,941
iTrader: 67 / 99%
Default

ok guys, I've tried Pmags, USGI mags, hk mags, c products....no change at all. Bolt will unlock with mod shake. Any other thoughts???
Reply With Quote
  #6  
Old 03-27-2010, 11:10 AM
Noobert's Avatar
Noobert Noobert is offline
Veteran Member
 
Join Date: Jan 2009
Location: FREE!!
Posts: 3,312
iTrader: 16 / 100%
Default

the followers of the empty mag push against the bolt catch, which stops the bolt carrier from slamming home, so is your bolt catch high enough? i can't think of anything else
__________________
(\__/)
(='.'=)
(")_(") Copy and paste this bunny into your signature to help him gain world domination.!!!

Quote:
Originally Posted by ivanimal View Post
I have yet to meet a bad calgunner. Gun people for the most part are the better side of society. That is my opinion.
Reply With Quote
  #7  
Old 03-27-2010, 11:23 AM
pacrimguru's Avatar
pacrimguru pacrimguru is offline
Veteran Member
 
Join Date: Sep 2008
Location: Pasadena, CA
Posts: 3,468
iTrader: 168 / 100%
Default

i had a similar problem on my 9mm build. is there a little bit of play when you pull the bolt back all the way and let it go to get caught by the bolt catch? i know its a different system but you might have the same problem i had.

on my 9mm build, the bolt would lock back but with any kind of shake or hit no matter how light, the bolt would get sent forward. to figure out why, i pulled the ch back all the way and let it go slowly to get caught on the bolt catch to see how much space there was. it was about 1/8" i think. i realized that you need way more space than that for the bolt catch to have time/space to do its thing. so i shaved off another 1/8" or so on the buffer's plastic spacer. now i have a little over 1/4" of space between the bolt when pulled back all the way and the bolt catch. it works perfectly now.

i hope i'm making sense!
__________________
AR Profiles: 1 | 2 | Past AR's: 1 | 2

Last edited by pacrimguru; 03-27-2010 at 10:57 PM..
Reply With Quote
  #8  
Old 03-27-2010, 8:15 PM
ar15barrels's Avatar
ar15barrels ar15barrels is offline
I need a LIFE!!
 
Join Date: Jan 2006
Location: Van Nuys
Posts: 37,078
iTrader: 86 / 100%
Default

Quote:
Originally Posted by badicedog View Post
ok guys, I've tried Pmags, USGI mags, hk mags, c products....no change at all. Bolt will unlock with mod shake. Any other thoughts???
Don't shake the gun.
Ride the bolt catch with a finger if it's important not to release.
__________________
Randall Rausch

AR work: www.ar15barrels.com
Bolt actions: www.700barrels.com
Foreign Semi Autos: www.akbarrels.com
Glock, XD and M&P pistols, Benelli and Remington shotguns: barrel, sight, trigger and receiver work.
Most work performed while-you-wait, evening and weekend appointments available.
Founding member of the CAPRC
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 5:04 AM.




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.