Removing play between lower/upper

[r34skyline]

Yes. I have already stated several times that all of this is indeed possible.
But it's also completely unnecessary, and a total waste of time and effort.

It costs $4, and takes 4 seconds to completely eliminate any wobble.

Why would any sane person argue against such a thing?

Because it introduces potential debris in your trigger mechanism which might case a substantial stoppage, makes takedown a pita, and has a zero positive gain other than maybe padding someones ocd... but yes it has zero positive gains when it comes to performance in either precision or speed. If holding your rifle/carbine is deemed as a total waste of time and effort might I suggest knitting as an alternate hobby?

 

[cr5]

Yes. I have already stated several times that all of this is indeed possible.
But it's also completely unnecessary, and a total waste of time and effort.

It costs $4, and takes 4 seconds to completely eliminate any wobble.

Why would any sane person argue against such a thing?

Not sure, other than I've owned around 15-20 different AR-15's and AR-10's over the years and I've never had one with enough wiggle to cause my eye and optic to go in and out of alignment while sighting a target.

Perhaps the AR platform and all other rifles that use an upper lower configuration held together with pins are just not the right rifles for you.
I'd really like to see your rifle, I just can't picture how it could have enough wiggle that your noticing your optic being in and out of alignment with your eye just from rocking it from one end of travel to the other while holding a consistent cheek weld.

Either way, go ahead and buy your rubber wedge and let us know how much better it is or isn't.
I bought an AR once that came with one in it, I'll have a look and if I can find it I'll mail it to you for free. Don't get too excited though, I probably threw it out and just don't remember doing it.

 

[mileageman]

Yes. I have already stated several times that all of this is indeed possible.
But it's also completely unnecessary, and a total waste of time and effort.

It costs $4, and takes 4 seconds to completely eliminate any wobble.

Why would any sane person argue against such a thing?

You know what else is a total waste of time? Reading this thread and trying to get you to admit you are wrong.


For the record I like the slop, that way I have something to blame when I can't hit my targets

 

[Dexter Morgan]

" Either way, go ahead and buy your rubber wedge and let us know how much better it is or isn't. "

No need. I already have them in all of my AR-15s.

And I already know they work great.

 

[Tiker]

I've seen many threads on this topic and all of them discuss the theory, but I have not seen one with shooting results. So I thought since I have all the stuff, why dont I just go give it a try.

This post is not just about accu wedge.
I have the following items:
Accu wedge: $4.95 USD
Griffin Armament over sized pins: $25 CAD
Brownells reciever shims $23.99 USD

I installed all of these. If accu wedge does improve accuracy, then having all 3 of these installed should be much more effective than just the wedge.

So, now onto the other stuff.
Rifle: HK MR223A3 14.5 inch
Optic: Minox ZP5 5-25
Ammo: FGMM 223, 77
Shooter: Me. I don't compete in any way. Never taken any rifle classes. Less than 10,000 rounds down the pipe in my whole life. Visit range 1-2 times per month.
Setup: Rifle resting on wooden block in front, rice bag in the rear. Here is picture:

Shooting done from prone at target 100 yards away. I bought a box of 20 rounds. Wasted 2 rounds, so I had enough ammo to shoot 2 5 round groups and 2 4 round groups. I installed the shim, wedge, and pins at home. When I arrived at the range, I first shot a 5 round group and then a 4 round group, with all the stuff installed:

Then I disassembled the rifle, took out the wedge, installed the stock pin, removed the shim and shot another group of 5 and 4:

As you guys can see, there is a difference. The 2 groups with the devices are better than the 2 groups with the stock rifle, thats a fact.

Now, could this be within the margin of error of the weather condition, rifle, optic, and me? 100%. So take a look and think about what you will be doing with your rifle. I took off the 5-25 optic right after this test and dont intend on installing it back onto this rifle anymore. For my purposes, I will not notice this difference again as I will not be using this high power optic and this expensive ammo for my regular shooting. And the cost to me is not simply $4. If I can travel back in time, I would of stopped myself from buying these things.

But maybe some people will think that improvement is worth it for their intended purpose, in which case I would say dont just get the wedge, get all the receiver tightening devices that you can get. Or just epoxy them together.

 

[PGW Steve]

All credibility that slop doesn't affect accuracy goes out the window when you reference the size of the dot in your zero magnification optic. The other glaring admission was that the slop is taken up when you preload the rifle along with the disclaimer that you have to do it consistently.

This is a hot topic and I think we all have to agree to disagree on this. As the builder and shooter of some pretty accurate rifles, consistency of vibration harmonics plays a big role in group size. If I can cut down on things that move when I don't want them to, I know I'm not leaving anything on the table. We're talking bipod/bench shot groups here, not the run and gun stuff where the accuracy difference between loose and snug becomes an insignificant player in the larger group.

 

[Sqr]

As it has been said there are many post on this, but it is all up between the ears of the shooter. Regardless if an owner agrees or disagrees that play can effect accuracy it is known that a shooter must be mentally comfortable and if having zero play assists you then it works.

Personally I hate holding a rattle can.

 

[Dexter Morgan]

" As you guys can see, there is a difference. The 2 groups with the devices are better than the 2 groups with the stock rifle, thats a fact. "

Thanks for sharing your results.

 

[Runningfool]

No need. I already have them in all of my AR-15s.

And I already know they work great.

This thread is giving me deja vu to the time you repeatedly defended the notion that a $20 crappy tire shot shell belt was a good idea for 3gun competitions and was a million times better than loading from a pocket.

 

[r34skyline]

This thread is giving me deja vu to the time you repeatedly defended the notion that a $20 crappy tire shot shell belt was a good idea for 3gun competitions and was a million times better than loading from a pocket.

Yeah don't waste your time, he wants peace of mind from useless upgrades instead of not sucking at shooting that's his call.