How to fix wobble between upper and lower on AR?

[JustinJ]

Wobble will not prevent the gun from functioning. Its your call but there is absolutely no reason not to use an accuwedge.

 

[mc223]

Honestly after all the negative comments I think I have made up my mind and untill I see a definitive effect on function or accuracy I will just deal with the wobble.

There is no effect on function.

There is no effect on accuracy.

The "wobble" of your rifle has no effect on me.

I really don't care what you do.

I use the Accuwedge.

I like it that my rifle does not "wobble".

The use of some cleaning agents or oils may have a detrimental effect on the Accuwedge.

I have the same Accuwedge in one of my rifles that I put in back in 2004.

Nope it has not come apart and caused any issues.

I like the Accuwedge.





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[451 Detonics]

I tried Googling Accuwedge failure and it is amazing. All it came up with was rumors, not a single instance of the device failing and causing problems...just "I heard" and "someone said". No images either. On the net today people post more pics of failures than they do successes so if it was a problem surely someone would have posted first hand info. However people have reported that shooting a group with one in place and then a group without it does show improvement when the wedge is used.

Is it a placebo? Perhaps, but the amazing thing about placebos is they often work and cause no harm. On a plinking gun it will likely not make a difference but if that wobble manifests at the instant the trigger is being pulled and moves the sights slightly it can be an issue when trying to hit at 600 yards.

My feelings are it can't hurt, may help, is a couple buck so why not use one. Plus it can get rid of an annoying noise that may spook game animals.

 

[kwelz]

Sorry but I have a hard time believing an accuwedge would come apart if properly installed given the way they are held when installed and that there are no moving parts contacting them.

What you believe or don't believe really don't matter. The reality is that they can and have failed in the past and caused rifled to malfunction.

If trigger control were the only key to accuracy all rifles would contain the same accuracy potential and AKs would be just as accurate as high end bolt action sniper rifles. There are a many factors that affect accuracy but for the most part they are about providing mechanical consistency from one shot to the next. The way a bullet goes into the chamber is one of the factors as it affects how it will seat and that is where upper/lower looseness comes into play.

If we are talking about pinpoint accuracy at 1000 yards sure. If we are talking about ~1MOA then no not really. I hate to tell you this but for the level of accuracy we are talking bout for 99.9% of shooters, the way a bullet enters the chamber makes ZERO difference.

By installing an accuwedge you are minmizing the amount of vibration that occurs at the pin. This is obvious by observing the amount of movement before and after installing an accuwedge. The more two metal parts move around the more and faster they wear. An accuwedge minimizes movement. The same principle applies to bearings, motors, pistons, whatever. If they are loose they wear rapidly. As they become looser the wear is accelerated.

The accuwedge puts force where it is not supposed to be. And you seem to think this is a good thing. That is fine.. You are still wrong.

The accuwedge serves the same purpose as the Bumpfire stock talked about in another thread. Separating fools from the money in their wallet.

 

[kwelz]

I tried Googling Accuwedge failure and it is amazing. All it came up with was rumors, not a single instance of the device failing and causing problems...just "I heard" and "someone said". No images either.

Funny. I did the same thing. Took me about 2 minutes to find this.

 

[Slamfire]

I don’t like wobble. But I was brought up on glass bedded bolt match rifles and NM Garands/M1a’s. Nothing on those rifles wobble in the slightest.

So I put an accuwedge between my uppers and lowers.

It makes absolutely no difference in function or on target.

On bud of mine, the year he was one of the NRA recognized best 200 shooters in the US, we were talking about this. You could hold his Space Gun and just rotate the lower about the upper. There was a lot of wobble.

He still shot cleans, lots of cleans.

I have not had a function problem with my Accuwedges, but I am only punching holes in paper and nothing more than my ego is on line.

 

[Robert]

Maybe I need more rounds through my AR before I start seeing this wobble. I have about 500 rounds through it since Christmas but should have another 1200 or more through it by the end of competition season. My upper and lower are very tight. I have to drive the pins out to get the thing apart. I can not simply push them out with my thumbs. I am interested to see what develops. I have handled rifles with well over 5000 rounds through them and have not seen a wobble.

Edit:
My rifle is a parts gun built on a RRA upper and lower. Nothing high end in my rifle.

 

[JustinJ]

Kwelz, that picture doesnt show much. An accuwedge, IF properly installed, is completely contained by the block that retains the pin. It is pressed down and behind it so i cant see how it or even a piece could come out.

As i said, for most ARs an accuwedge will make a negligible difference. However, if you believe the way a bullet goes into the chamber makes no difference, load an AR with decent accuracy potential one bullet at a time by hand and see if the POI does not shift from using a magazine.

High end ARs all match upper and lower receivers specifically to avoid wobble for a reason.

"The accuwedge puts force where it is not supposed to be. And you seem to think this is a good thing. That is fine.. You are still wrong."
What i think is a good thing is not having loose metal parts rattling against eachother causing wear. If you cant understand how that is a bad thing i don't know what to tell ya.

 

[AK103K]

I have an old Colt SP1 thats got many tens of thousands of rounds though it at this point, and its still as tight as the day I bought it. Never had any wobble, and the pin pops right out when pushed.

My Bushmaster on the other hand, always had what I felt was excessive wobble, and its pins are harder to get out than the Colts.

I have had a number of AR's over the years, and some where tight, some werent, even in guns of the same maker. The Armalites I have now have always been "tight", my latest, an S&W M&P15, has some wiggle in there, but its not all that bad, and with the wiggle in the sliding stock, not really noticeable.

For me, its a lot more annoying on fixed stocks than it seems to be on the sliders.