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Question for JAE-100 owners

This is a discussion on Question for JAE-100 owners within the Modern M14 forums, part of the M14 M1A Forum category; I was looking the stock over last night and noticed a visible gap running all the way from the bolt roller to the heel. In ...


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Old February 16th, 2009, 09:38 PM   #1
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Question for JAE-100 owners

I was looking the stock over last night and noticed a visible gap running all the way from the bolt roller to the heel. In other words, if you look sideways at the gun (from the bolt stop side for our discussion) the reciever makes no stock contact from the bolt roller back. If you hold it up to the light, you can see the gap.

On a USGI stocked m14, there is contact under the heel. The gap starts about an inch up from the heel, toward the front of the rifle and runs to the bolt release.

Asked JAE if this was right and they said their lug system was different and took care of this. That really didn't sound right. Wouldn't the job of the lugs be to pull the reciever into the stock. And even if the reciever was held tight, wouldn't it be better if there was stock contact in this area.

Can't really answer the obvious question: How does it shoot? Just got it to the range first time yesterday and scope had issues so the scope is going back to the manufacturer.

So here's my question: do other JAE owners have this gap on their guns and what kind of accuracy are you experiencing with this stock?

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Old February 17th, 2009, 09:13 PM   #2
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I have 2 rifles in JAE Gen2 stocks. An LRB M25, and an SAI Loaded.

Neither rifle has the space you mention.

My LRB went from 1.25" groups, to 5/8" groups, just by dropping into the JAE.

Still working on the Loaded, but have her groups down to about 1.5" in the JAE.

Make sure you have your rifle torqued in properly. If you do not have an LRB or a Smith Enterprise rifle, I would suspect the receiver may be out of spec. Can you post pics of your rifle/stock?

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Old February 17th, 2009, 10:14 PM   #3
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Do you have problems with them loosening up while shooting?

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Old February 17th, 2009, 10:23 PM   #4
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Quote:
Originally Posted by Night Stalker View Post
Do you have problems with them loosening up while shooting?
I must admit, I have not had any problems with the JAE's. The more I use them, the more of them I want. I have one more rifle that warrants a JAE. Nothing has come loose on either of mine.

The only issue I have seen is with the bbl tensioner. It is a crafty little bugger, that if not set right can REALLY affect groups. The tensioner on my LRB remains untouched, but the Loaded stock was lightly used when I got it, and the tensioner had already been tweeked. I played with it some last week at the range and dropped my groups from 3" to about 1.5". I'll keep playing with it this weekend.

So far, the JAE's have exceeded my expectation in every possible way.

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Old February 18th, 2009, 08:42 PM   #5
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Do you happen to know what the torque specs are on the JAE? I have one, but no manual.

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Old February 18th, 2009, 09:16 PM   #6
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It sounds like the SA receivers have a fit problem, is this right?

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Old February 18th, 2009, 10:14 PM   #7
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Quote:
Originally Posted by GoBig View Post
Do you happen to know what the torque specs are on the JAE? I have one, but no manual.
Let me check my paperwork for torque specs. I have forgotten.

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Old February 18th, 2009, 10:21 PM   #8
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Quote:
Originally Posted by Night Stalker View Post
It sounds like the SA receivers have a fit problem, is this right?
My Loaded is an SAI receiver, and it fits great. I'd venture a guess that some SAI receivers will have variances. SAI sure makes an awful lot of them!

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Old February 19th, 2009, 06:26 AM   #9
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Torque value is 15 inch-pounds for the lugs.

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Old February 19th, 2009, 10:08 AM   #10
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No Problems there

Quote:
Originally Posted by Night Stalker View Post
Do you have problems with them loosening up while shooting?
Nope. Torqued to 13 in/lbs with snap-on dial type torque wrench and marked the bolts with nail polish. Thats a good thing to do on any part. I mark a line from Gas Lock to cylinder; flash supressor to castle nut; gas system nut to gas lock; and of course my sights. This way, if I ever have to strip in the field I can get her back to close. No room in my boogie bag for that torque wrench!!!

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Old February 19th, 2009, 10:11 AM   #11
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Quote:
Originally Posted by Night Stalker View Post
It sounds like the SA receivers have a fit problem, is this right?
I think some do. Bottom line, get her greased up and shoot it!!! It's the only way you'll know. SA has great customer service. I had the bolt roller fall off. Sent the gun back and mentioned the fit problem in the return letter. Gun came back with new bolt, new stock and new trigger group. All now works well.

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Old February 19th, 2009, 10:16 AM   #12
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from the jae manual

Quote:
Originally Posted by GoBig View Post
Do you happen to know what the torque specs are on the JAE? I have one, but no manual.
Torque specs:

lug slides 15 (all specs in in./lbs.)
butt system 5
cheek rest 5
palm rest 5
off hand rest 5
main forend rail 5

Do no use any type of thead locking compound!

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Old February 19th, 2009, 02:30 PM   #13
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Interesting post:
I have had four JAE stocks on my guns. Two Gen 1s which were replaced by two Gen 2s. On three of the guns (all SAs) the receiver fit flush with the aluminum stock all the way around. On one standard model the receiver bottom isn't perfectly square, and so at the back of the receiver you could just about slip a piece of paper between it and the stock -- just at the rear of the receiver. But the action is mounted in teh stock like a rock, however, the aluminum lugs pulling the action down tight --

Because not all SAs (or chines M-14s) will have perfectly flat receivers, the JAE system works best because it locks the receiver against the stock -- I really would like to see a PICTURE of this "gap" you are talking about -- because we've all be Jacking off here discussing it without seeing how you mounted the stock.

FYI: if there is a BIG gap, like an 1/8 or 1/4 of an inch, then you did not install the stock correctly. Sometimes it feels like you've tightened the lugs all the way down, but if you try to tighten them ALL THE WAY before the action is seated properly they will stop right there. So show us.

As a side note, what was wrong with the scope you returned?

I'm just trying to determine if you're one of those "I return everything" guys like my friend Fred who is NEVER satisfied until every watch, gun and car he owns has been back to the factory at least once.

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Old February 19th, 2009, 03:10 PM   #14
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reply to Gunrider above

Problem with the scope: had windage (133 total clicks) all the way left and impact still printing 5 inches to right of target at 50 yards. I did not want to crank on it as it seemed to be at the end of its travel. Had three other guys look at and then took it to gunsmith who said it could not be bore sighted. this scope had been on another m1a and exhibited the same problem.

The nitty gritty: scope went on a loaded m1a with JAE-100 gen 2 stock (the gappy stock). Used Smith Enterprise M21 mount. Leveled stock both ways using stripped sight base and gage blocks and machinist level as per Smith's instructions. Used Snap-On in./lb. torque wrench to tighten that and everything else to proper specs. Scope has internal bubble level, and that was right on, too.

So no, I am not one of those guys who returns everything. I think I did my due diligence here to ensure it was the scope.

Just eyeballing the scope, it looked like it was lined up with the bore and sometimes when they are way off you can see it.

The gaps: I took another M1a and mounted it to see if gap was still there. It was. On swapped in gun, the gap measured
.014 with a feeler gauge under the heel and tapered to .004 just ahead of the bolt release. On the original gun in the stock, it measured .020 and tapered to .004 about 1/2 inch ahead of the bolt release and then made contact.

Pictures are forthcoming as soon as i figure out how to post them.

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Old February 19th, 2009, 03:57 PM   #15
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Off topic: What kind of scope was it? I'm trying to think of what scopes come with bubble levels, and I can't think of any good answers...

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