[mgiachello]

I noticed on my ar .22lr that i just purchased that the upper will wobble a bit when on the lower. I talked to a guy and he said there is a rubber bushing that would go in the back to make it a tighter fit. I tried putting it in but it just doesnt seem to fit. Can somebody help me with this? Thanks

 

[t-star]

your "friend " is fos- they all wobble a bit, and that "thing' you have is called an accu-wedge, and is a solutiion to a non-existant problem- google accu-wedge and you'll see how it goes in- i had one, put it in, and found it impossible to crack the receivers apart to clean, and gave NO IMPROVEMENT in accuracy- remember, you're using an UNMATED upper and lower, so it's not as good as a dedicated 22 rifle due to manufacturing tolerances- mine's in the garbage-
it's actually meant for the 223 versions, and MIGHT NOT fit if the lower is of different dimensions on the inside- if it doesn't you're out all of 4-7 bucks

 

[CaptainGyro]

Don't buy one...you can probably borrow one from one of your friends. Almost every AR shooter has one. It might be sitting on his bench, somewhere in the bottom of his range bag, in his toolbox, or under a table leg to keep it from wobbling. It just won't be in his AR.

 

[Charlie Petty]

Thanks Mike... I've got this wobbly workbench... now if I can just find the wedge... :-?

T-star is right because the fit of the two halves is irrelevant as long as they are close enough together to fire. Since all the lower really does is provide something to hold on to, a place to put the magazine and the trigger. The parts that matter for accuracy are all on top. The sights and barrel are on the same plane so even if the bottom wobbles a bit the bullet is long gone before the wobble would matter.