Accu-wedges in an AR-10

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DMW1116

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I have been trying to get final set-up and loads done for my PA-10 I bought before the 2020 rioting and pandemic. I've been testing some loads through it lately and just noticed a little vertical play between upper and lower. When shooting from a rest, it can move enough that I can see it clearly through my scope. I doubt I could see it without magnification, and it might be invisible with less magnification. I'm running at 9x for load testing.

Are accu-wedges available for the AR10 platform? It doesn't seem to affect accuracy, and I just noticed it after having the rifle nearly 2 years, so it's not that much. I don't see any excess wear in the buffer tube where the BCG is hitting the sides during firing. Is this something that can happen? It seems like I've been firing it all this time with it in the most open position, as I only saw it move the first time a couple of weeks ago when I was pulling and pushing it around on the rest trying to move the cross hairs to the right place on target.
 
DMW1116 said:
I have been trying to get final set-up and loads done for my PA-10 I bought before the 2020 rioting and pandemic. I've been testing some loads through it lately and just noticed a little vertical play between upper and lower. When shooting from a rest, it can move enough that I can see it clearly through my scope. I doubt I could see it without magnification, and it might be invisible with less magnification. I'm running at 9x for load testing.

Are accu-wedges available for the AR10 platform? It doesn't seem to affect accuracy, and I just noticed it after having the rifle nearly 2 years, so it's not that much. I don't see any excess wear in the buffer tube where the BCG is hitting the sides during firing. Is this something that can happen? It seems like I've been firing it all this time with it in the most open position, as I only saw it move the first time a couple of weeks ago when I was pulling and pushing it around on the rest trying to move the cross hairs to the right place on target.
Click to expand...

It's not really hurting anything & should be fine from a wear standpoint, can help with accuracy minimizing movement/better consistency. I did put a wedge in one of my ar15's to tighten up the movement. Don't believe I've seen anything available larger for the large frame rifles though.
 
There was a company selling eccentric takedown pins which can be snugged up with an allen wrench. Pretty sure these would work with most AR10s if you can find them.

Ive used thin slices of high-density adhesive foam to snug up several uppers with good results. A block of it under the rear takedown pin lug and a few strips on the sides of the lower frame rails work wonders.
 
As long as I can't see it in the scope, I don't mind. It took a fair bit of use to even notice and based on yesterday's range trip, it doesn't affect accuracy enough for me to notice. I have a few loads to test to try to dial in the 168 grain Amax I have. If it starts to bother me during that process I'll look into them more.
 
Seems likely that’s what was happening and why I just now noticed.
 
Some of the wedges say they need to be trimmed off to fit an AR10.I put one in a DPMS 308 that I used to have.It took a lot of trimming to get to fit,but I was finally able to get the rear pin back in.I took it to the bench and shot it and it shot a second shot all by itself.I had an Elf trigger in it and apparently the wedge put pressure on something in the trigger that caused it to double.I thought about putting a thicker wedge in it to see if I could get a 3 round burst,but I decided to play it safe and took the wedge out and all was well again.I hated that rifle with a passion and traded it for a bolt gun.Just be careful if you install a wedge.
 
WVRJ said:
Some of the wedges say they need to be trimmed off to fit an AR10.I put one in a DPMS 308 that I used to have.It took a lot of trimming to get to fit,but I was finally able to get the rear pin back in.I took it to the bench and shot it and it shot a second shot all by itself.I had an Elf trigger in it and apparently the wedge put pressure on something in the trigger that caused it to double.I thought about putting a thicker wedge in it to see if I could get a 3 round burst,but I decided to play it safe and took the wedge out and all was well again.I hated that rifle with a passion and traded it for a bolt gun.Just be careful if you install a wedge.
Click to expand...

You don’t have the wedge installed properly if this is possible. It’s a LONG ways from the rear pin location to any trigger/hammer interference. Did you put the wedge into the lower with the flange pointing forward?
 
Please do not waste your money on the accu wedges. There are much simpler, likely cheaper options available to you that perfectly fixes this problem. I personally use the rubberized type padding from inside an old gun case. It is similar to weatherstripping but in larger sheets and much more resilient and easy to cut to whatever size is needed. Same would go for the rubber moulding around old dryer or fridge doors, etc. Those accu wedges aren't going to last long with you taking the gun apart to clean or boresight. The stuff I am recommending is mostly free. Just make sure the safety stays operational and if you are putting any up by the front pin that it doesn't block the magwell.
 
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