Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > Help on minor issue

Reply
 
LinkBack Thread Tools Display Modes
Old 02-26-2012, 02:17 AM   #1
Feedback Score: 0 reviews
 
nastyogre's Avatar
 
Join Date: Nov 2011
Posts: 116
Liked 8 Times on 7 Posts

Default Help on minor issue

I just got done test firing my first AR build and the bolt won't stay back after the last round is fired. I checked the mags and they're fine. I don't think it could be the bolt or buffer being too heavy because it cycles just fine. If I pull the bolt back and hold the catch out then it will hold but only until I take my hand away, then it slams home again. I'm thinking the spring on the bolt catch is too strong? Any thoughts are greatly appreciated. :-)



__________________
nastyogre is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 02-26-2012, 03:11 AM   #2
Feedback Score: 0 reviews
 
purehavoc's Avatar
 
Join Date: Oct 2011
Location: Not where I wanna be
Posts: 4,721
Liked 1120 Times on 727 Posts
Likes Given: 1998

Default

Take a couple turns back out of the bolt catch assembly , spring might be compressed to tight .



__________________
purehavoc is offline  
 
Reply With Quote
Old 02-26-2012, 03:28 AM   #3
Feedback Score: 0 reviews
 
mjkeat's Avatar
 
Join Date: Jul 2010
Location: Wichita,Kansas
Posts: 4,026
Liked 8 Times on 8 Posts

Default

I don't believe there's anything to turn w/ the bolt catch. You're probably thinking about the mag catch.

OP, I'll get one out and see ass soon as all the cops leave. Drug bust 2 houses down. The same guys that may have vandalized the wifes car a few nights ago. Don't want them coming to the door w/ it our

__________________

“The bitterness of poor quality Lingers long after The sweetness of low price is forgotten.”
-John Ruskin

Quote:
Originally Posted by Quentin View Post
"The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together."
mjkeat is offline  
 
Reply With Quote
Old 02-26-2012, 03:38 AM   #4
Feedback Score: 0 reviews
 
nastyogre's Avatar
 
Join Date: Nov 2011
Posts: 116
Liked 8 Times on 7 Posts

Default

Quote:
Originally Posted by mjkeat
I don't believe there's anything to turn w/ the bolt catch. You're probably thinking about the mag catch.

OP, I'll get one out and see ass soon as all the cops leave. Drug bust 2 houses down. The same guys that may have vandalized the wifes car a few nights ago. Don't want them coming to the door w/ it our
I was thinking the same thing but it's been years since I built the lower so I didn't remember if there was an adjustment. It's a Fulton armory lower ( read Cali legal) with a dpms lpk(crap I know). :-)
__________________
nastyogre is offline  
 
Reply With Quote
Old 02-26-2012, 03:54 AM   #5
Feedback Score: 0 reviews
 
Jpyle's Avatar
 
Join Date: Aug 2009
Location: Sewell,NJ
Posts: 4,815
Liked 762 Times on 441 Posts
Likes Given: 457

Default

Couple things to consider...are the proper spring and detent installed? Did you dry fire the gun with the upper removed and let the hammer slam the bolt catch, is the any noticable bend or misalignment. Any visible damage to the roll pin, is the release square to the slot in the lower and free to move without excessive force? That pin can be a real nutbuster to install, too much force can damage the pin or the release tab itself.

Unpin the upper and insert an empty mag...you should see the follower force the catch up, when you press the release there should be visible downward movement. I can't imagine that the bolt catch spring would be stronger than the mag spring, certainly not enough to offset the designed purpose of the follower, maybe its just a bit stiff.

__________________

"The whole of the Bill (of Rights) is a declaration of the right of the people at large or considered as individuals.... It establishes some rights of the individual as unalienable and which consequently, no majority has a right to deprive them of." (Albert Gallatin of the New York Historical Society, October 7, 1789)

"A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington

Jpyle is offline  
 
Reply With Quote
Old 02-26-2012, 03:59 AM   #6
Feedback Score: 0 reviews
 
mjkeat's Avatar
 
Join Date: Jul 2010
Location: Wichita,Kansas
Posts: 4,026
Liked 8 Times on 8 Posts

Default

Just took a look and can't think of a reason why it's doing what it's doing. The force from the buffer spring pushes the bolt against the bolt catch holding it up which stops the bolt from closing on the chamber. If the spring is to strong, like you eluded to, then it could possibly force the bolt catch back despite the bolt riding up against it.

__________________

“The bitterness of poor quality Lingers long after The sweetness of low price is forgotten.”
-John Ruskin

Quote:
Originally Posted by Quentin View Post
"The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together."
mjkeat is offline  
 
Reply With Quote
Old 02-26-2012, 04:15 AM   #7
Feedback Score: 0 reviews
 
Jpyle's Avatar
 
Join Date: Aug 2009
Location: Sewell,NJ
Posts: 4,815
Liked 762 Times on 441 Posts
Likes Given: 457

Default

Quote:
Originally Posted by mjkeat View Post
Just took a look and can't think of a reason why it's doing what it's doing. The force from the buffer spring pushes the bolt against the bolt catch holding it up which stops the bolt from closing on the chamber. If the spring is to strong, like you eluded to, then it could possibly force the bolt catch back despite the bolt riding up against it.
I was thinking what he meant was that the spring is to tight to allow the follower to push the catch up to stop the bolt so it just passes right over the catch.
__________________

"The whole of the Bill (of Rights) is a declaration of the right of the people at large or considered as individuals.... It establishes some rights of the individual as unalienable and which consequently, no majority has a right to deprive them of." (Albert Gallatin of the New York Historical Society, October 7, 1789)

"A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington

Jpyle is offline  
 
Reply With Quote
Old 02-26-2012, 11:30 AM   #8
Feedback Score: 0 reviews
 
purehavoc's Avatar
 
Join Date: Oct 2011
Location: Not where I wanna be
Posts: 4,721
Liked 1120 Times on 727 Posts
Likes Given: 1998

Default

Quote:
Originally Posted by mjkeat View Post
I don't believe there's anything to turn w/ the bolt catch. You're probably thinking about the mag catch.

OP, I'll get one out and see ass soon as all the cops leave. Drug bust 2 houses down. The same guys that may have vandalized the wifes car a few nights ago. Don't want them coming to the door w/ it our
Yup , my bad on that one, too many beers last night ,
Maybe your California spec lower isn't made to stay open. Just a thought although I wouldn't think it would work like that
__________________
purehavoc is offline  
 
Reply With Quote
Old 02-26-2012, 01:57 PM   #9
Feedback Score: 0 reviews
 
mjkeat's Avatar
 
Join Date: Jul 2010
Location: Wichita,Kansas
Posts: 4,026
Liked 8 Times on 8 Posts

Default

Quote:
Originally Posted by Jpyle View Post
I was thinking what he meant was that the spring is to tight to allow the follower to push the catch up to stop the bolt so it just passes right over the catch.
I'm a little confused. He mentioned if he activates the catch manually it will lock the bolt back but when he lets go the spring pushes the bottom of the ping pong out dropping the catch allowing the bolt to slam home. On mine friction hold the catch in place. It is just a guess but I figure if the spring was to strong it would over power the friction b/w the bolt and catch. Add the bolt and mag follower together and you'd have enough to over power the spring.
__________________

“The bitterness of poor quality Lingers long after The sweetness of low price is forgotten.”
-John Ruskin

Quote:
Originally Posted by Quentin View Post
"The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together."
mjkeat is offline  
 
Reply With Quote
Old 02-27-2012, 04:15 AM   #10
Feedback Score: 0 reviews
 
nastyogre's Avatar
 
Join Date: Nov 2011
Posts: 116
Liked 8 Times on 7 Posts

Default

Sorry for the confusion, the only way the bolt will stay open is if I hold the catch and pull the bolt back. The friction and follower are not enough to overpower the spring in the catch(I think). I will take the catch off when I get the chance and figure out what's up. I've tried gi mags and a brand new pmag and neither one had a strong enough follower to hold it open. Thanks for the help guys. :-)



__________________
nastyogre is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
A minor handgun dilemma aandabooks Semi-Auto Handguns 17 01-04-2012 09:17 PM
minor w/o FOID w/ Grandpa BelRockRebel Legal and Activism 1 12-02-2011 07:31 PM
A minor get-off at Barber last weekend CourtJester The Club House 4 08-16-2011 04:14 PM
Minor prob with Century M70 shenny AK & SKS Discussion 3 03-21-2011 07:37 PM
Ok, so what do we do with something minor like a hurricane? GlenJohnson Survival & Sustenance Living Forum 3 02-06-2008 04:59 PM



Newest Threads