stock fit question on m1a - M14 Forum

M14 Forum


stock fit question on m1a

This is a discussion on stock fit question on m1a within the The M14 forums, part of the M14 M1A Forum category; i just acquired an older m1a circa 9-79. i didn't want the ratty looking stock it was in so we didn't trade stocks just actions ...


Go Back   M14 Forum > M14 M1A Forum > The M14

Reply
 
LinkBack Moderator Tools Display Modes

Old October 3rd, 2009, 02:57 PM   #1
Platoon Sergeant
 
blackhawkkid308's Avatar
 
Join Date: Jul 2004
Location: pensacola florida
Posts: 327
Post stock fit question on m1a

i just acquired an older m1a circa 9-79. i didn't want the ratty looking stock it was in so we didn't trade stocks just actions and when i put it in all my stocks the barrel band up front is super tight as in no movement at all and it is hard to get the trigger group to lock in because of severe tightness. what i mean is the trigger guard is about half way closed when it stops. it doesn't do this on my other 2 rifles. the gas system is unitized and the barrel says NM on it but nothing else. the barrel is standard weight. do i need any slop in the front fit like my other rifles or is this a good thing? it is the middle rifle below.
bhk308

blackhawkkid308 is offline  
Remove Ads
Old October 3rd, 2009, 03:26 PM   #2
Old Salt
 
Join Date: Aug 2007
Location: NY
Posts: 1,848

Awards Showcase

Quote:
Originally Posted by blackhawkkid308 View Post
i just acquired an older m1a circa 9-79. i didn't want the ratty looking stock it was in so we didn't trade stocks just actions and when i put it in all my stocks the barrel band up front is super tight as in no movement at all and it is hard to get the trigger group to lock in because of severe tightness. what i mean is the trigger guard is about half way closed when it stops. it doesn't do this on my other 2 rifles. the gas system is unitized and the barrel says NM on it but nothing else. the barrel is standard weight. do i need any slop in the front fit like my other rifles or is this a good thing? it is the middle rifle below.
bhk308
The front band lip is supposed to hook under the ferrule on the stock and pull up on it (or the ferrule is supposed to pull down on the lip - same thing, it just depends on how you think of it). The idea is that the tension between the two should damp the barrel's flailing each time it's fired and then present a positive position for the barrel to return to once it calms down, so that tension is a good thing.

At the same time, the front surface of the ferrule shouldn't be touching the back surface of the front band; the only contact point should be the front band lip and ferrule. When you say there's "no movement at all" compared to your other receiver, where was the movement in that receiver? And when the trigger guard is half closed, is there space between the bottom of the receiver's heel and the top of the stock that's under it?

The tightness of that lockup can also be due to a tight fit of the receiver in the stock, which is a good thing. But what's odd is that receivers are normally made to much tighter tolerances than stocks are and I doubt you should be getting such different fits in the same stocks unless something else is going on. Do your other rifles fit better in the stocks you're having trouble with now?

M1AallTheWay is offline  
Old October 3rd, 2009, 03:35 PM   #3
Platoon Sergeant
 
blackhawkkid308's Avatar
 
Join Date: Jul 2004
Location: pensacola florida
Posts: 327
Post i'll try to answer

Quote:
Originally Posted by M1AallTheWay View Post
The front band lip is supposed to hook under the ferrule on the stock and pull up on it (or the ferrule is supposed to pull down on the lip - same thing, it just depends on how you think of it). The idea is that the tension between the two should damp the barrel's flailing each time it's fired and then present a positive position for the barrel to return to once it calms down, so that tension is a good thing.

At the same time, the front surface of the ferrule shouldn't be touching the back surface of the front band; the only contact point should be the front band lip and ferrule. When you say there's "no movement at all" compared to your other receiver, where was the movement in that receiver? And when the trigger guard is half closed, is there space between the bottom of the receiver's heel and the top of the stock that's under it?

The tightness of that lockup can also be due to a tight fit of the receiver in the stock, which is a good thing. But what's odd is that receivers are normally made to much tighter tolerances than stocks are and I doubt you should be getting such different fits in the same stocks unless something else is going on. Do your other rifles fit better in the stocks you're having trouble with now?
-
my other rifles don't fit as tight at the front barrel band and ferrule as this one does. the rifle i traded for this one fit in my fat boy nm stock just perfect. this rifle fits much tighter and i can't get the trigger group to lock in it period as it is way to tight on the trigger lock up. no gap at the rear when it won't lock.
bhk308

blackhawkkid308 is offline  
 
Old October 3rd, 2009, 07:43 PM   #4
Old Salt
 
Join Date: Aug 2007
Location: NY
Posts: 1,848

Awards Showcase

Quote:
Originally Posted by blackhawkkid308 View Post
-
my other rifles don't fit as tight at the front barrel band and ferrule as this one does. the rifle i traded for this one fit in my fat boy nm stock just perfect. this rifle fits much tighter and i can't get the trigger group to lock in it period as it is way to tight on the trigger lock up. no gap at the rear when it won't lock.
bhk308
Well, let's see what we know (correct me if I'm wrong). You have a number of stocks which fit properly on a number of M1A actions, one of which you traded away. Its replacement won't lock up at all in any of the stocks, which suggests something different, or maybe wrong, with your new old action. I assume it fit OK in the stock your trading partner kept (I bet he's having as much trouble as you are but in the opposite direction of way too sloppy a fit - you might ask him about that). Since you using a NM stock, I assume it's been bedded for the action you traded away but if it'll work as least sort of with your other actions, it's more likely the problem is with the action.

Normally, before trigger group lockup, there's some space under the receiver's heel. When you close the trigger guard and pull the heel down, you're also pulling the barrel and front band up, and that's where the tension at the front band lip comes from. Does this action have an oversized barrel and/or op rod guide that's getting jammed in the fore end of the stock?

M1AallTheWay is offline  
Old October 4th, 2009, 01:57 AM   #5
Platoon Sergeant
 
blackhawkkid308's Avatar
 
Join Date: Jul 2004
Location: pensacola florida
Posts: 327
Post the opr guide id tighter---

the oprod guide is tighter in the stock than the other ones so that is probably the problem up front. the stock i can't get it to work in is an oversized national match fat-boy stock that i had problems with another rifle also. thanks for the info.
bhk308

blackhawkkid308 is offline  
Old October 4th, 2009, 10:35 AM   #6
Old Salt
 
Join Date: Aug 2007
Location: NY
Posts: 1,848

Awards Showcase

Quote:
Originally Posted by blackhawkkid308 View Post
the oprod guide is tighter in the stock than the other ones so that is probably the problem up front. the stock i can't get it to work in is an oversized national match fat-boy stock that i had problems with another rifle also. thanks for the info.
bhk308
The op rod guide shouldn't be touching the interior of the stock at all. One way to test this is to slip a card down into one side of the stock and get it to slide up the other side so you can grab both ends (it's easier with the hand guard off). Then slide the card from one end of the barrel to the other. If you can't do that, it's likely that something connected to the barrel is touching the stock. Ideally, the barrel should be free of the stock from the front of the receiver to where the front band lip hooks under the ferrule.

M1AallTheWay is offline  
Reply

  M14 Forum > M14 M1A Forum > The M14


Search tags for this page
ferrule fit
,

m1a op rod guide touches stock

,

m1a stock fitting

,
m1a trigger fit tight
,
old m1a stock fit
,
op rod guide touches stock
,
ratty m14 stock
,
stock fitting
,
tight front ferrule fit
Click on a term to search for related topics.

Moderator Tools
Display Modes


Similar M14 Forum Discussions
Thread Thread Starter Forum Replies Last Post
Promag M1A precision stock Question Night Stalker Stock 1 October 4th, 2011 06:06 PM
Hand guard to stock fit question Divepanama Accuracy 1 April 27th, 2011 10:49 AM
How soon will a receiver "shoot loose" in a stock. Gus Fisher Gus Fisher 8 September 29th, 2010 09:44 PM
How to clearance GI handguard to stock? LbSigMan The M14 9 February 16th, 2009 04:28 PM
USGI NM Stocks pezboy The M14 4 July 22nd, 2007 03:32 AM



Top Gun Sites Top Sites List