UPPER AND LOWER LOOSE?

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[ARCHIVED THREAD] - UPPER AND LOWER LOOSE?

Posted: 4/29/2011 3:23:24 PM EDT

i have a ddm4 upper mounted on a stag lower, i find a little play between the upper and lower, how do i fix that?
i bought a accu wedge a while ago just in case, will that help?

Posted: 4/29/2011 3:36:30 PM EDT

[#1]

Isn't it normal to have some play?

Posted: 4/29/2011 3:38:43 PM EDT

[#2]

Quoted:

Isn't it normal to have some play?

Yep, not a problem.

Posted: 4/29/2011 4:30:01 PM EDT

[#3]

Normal, tolerances.

Posted: 4/29/2011 4:52:34 PM EDT

[#4]

Quoted:
Normal, tolerances.

ok...i leave it alone...thanks

will it affect the accuracy?

Posted: 4/29/2011 4:53:53 PM EDT

[#5]

Won't effect accuracy

Posted: 4/29/2011 5:05:53 PM EDT

[#6]

Quoted:

Quoted:
Normal, tolerances.

ok...i leave it alone...thanks

will it affect the accuracy?

nope

Posted: 4/29/2011 5:40:02 PM EDT

[#7]

Quoted:

i have a ddm4 upper mounted on a stag lower, i find a little play between the upper and lower, how do i fix that?

i bought a accu wedge a while ago just in case, will that help?

Yes, that is what the accu wedge is for

Posted: 4/29/2011 5:44:09 PM EDT

[#8]

Some people use an accuwedge to tighten up the fit. I wouldn't bother; as posted above, it's completely normal.

Posted: 4/29/2011 8:35:09 PM EDT

[#9]

i like my receiver wiggle.

almost as much as i like my sproing

Posted: 4/30/2011 11:45:55 PM EDT

[#10]

The accuwedge is a neat piece of pretty much useless feel good crap that made the inventor a bunch of money. I bought one too when I first started shooting AR's but they are totally un-needed. USGI spec for play is .020. If you can slide a .020 feeler gauge between the ears of the receiver and the lug of the upper it is considered too loose. I doubt you will find many factory built AR's that loose and if you did I'd consider replacing the upper rather than spending money on gizmos.

Posted: 5/1/2011 6:45:41 AM EDT

[#11]

Its normal,Dont wedge it..waist of money,wont affect accuracy.Its a service weapon a little play is good.Easy to strip with no tools is a good thing.

Posted: 5/1/2011 6:50:02 AM EDT

[#12]

Quoted:

Quoted:
Normal, tolerances.

ok...i leave it alone...thanks

will it affect the accuracy?

No, your barrel and sights are all attached to the upper.
As long as the barrel is properly installed and your sights are tight accuracy will not be affected.
All the lower does is hold the fire control where it can fire the round in the chamber.

Posted: 5/1/2011 9:25:05 AM EDT

[#13]

Quoted:

Quoted:
Normal, tolerances.

ok...i leave it alone...thanks

will it affect the accuracy?

nope

I have a Daewoo K-2 and it had some wiggle I put a 0-ring that some one here suggested and my groups tightened up a lot and that's with the same ammo I have been shooting

Posted: 5/1/2011 10:06:22 AM EDT

[#14]

Quoted:

Quoted:
Normal, tolerances.

ok...i leave it alone...thanks

will it affect the accuracy?

nope

I have a Daewoo K-2 and it had some wiggle I put a 0-ring that some one here suggested and my groups tightened up a lot and that's with the same ammo I have been shooting

I believe were talking about AR-15's here.
I have about the same wiggle in my old Colt SP1 as my BCM middie no gizmoes in either.

Posted: 5/1/2011 11:56:38 AM EDT

[#15]

will it cause lower crack under heavy fire?

Posted: 5/1/2011 12:45:04 PM EDT

[#16]

Slop between the upper & lower affects nothing. There's nothing more to it. I thought that this has been made abundantly clear?

Posted: 5/1/2011 2:46:44 PM EDT

[#17]

Quoted:
will it cause lower crack under heavy fire?

No. The same loose fit on 458 Socom or Beowolf uppers doesn't cause cracking, and they recoil much more than 556.

Posted: 5/1/2011 2:52:43 PM EDT

[#18]

Quoted:
The accuwedge is a neat piece of pretty much useless feel good crap that made the inventor a bunch of money. I bought one too when I first started shooting AR's but they are totally un-needed. USGI spec for play is .020. If you can slide a .020 feeler gauge between the ears of the receiver and the lug of the upper it is considered too loose. I doubt you will find many factory built AR's that loose and if you did I'd consider replacing the upper rather than spending money on gizmos.

I wouldn't call it useless but it isn't something that is needed. If the wiggle bothers someone it is a cheap fix(as is the o ring trick). A bunch of lowers now have set screws to help with this as well.

OP it is normal and yes an accuwedge should help. The wiggle doesn't effect accuracy.

Posted: 5/1/2011 3:07:49 PM EDT

[#19]

It bothers me so I got a little black rubber O-ring 1/2" ID and smaller than 3/32 thickness and it seems to do the trick. 3/32 is just large enough that when it flattens out it will disrupt mags from dropping free.

Posted: 5/1/2011 3:42:58 PM EDT

[#20]

I think for most applications, the wiggle between the upper and lower is inconsequential for accuracy. However, if you are doing precision shooting with your AR and holding your rifle on a bench the via traditional method i.e. right hand on the grip and around the trigger and left hand under the right arm with your left hand gripping the end of the stock, you are going to lose some accuracy. This is because if you are trying to steady the gun using your left hand on the stock and the stock wiggles, then you can see why it may be more difficult controlling your barrel and thus accuracy.

Posted: 5/1/2011 4:29:52 PM EDT

[#21]

dupe

[ARCHIVED THREAD] - UPPER AND LOWER LOOSE?

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