Shimming your AR for a tighter fit.


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Bottom Gun
May 14, 2003, 06:04 PM
My Eagle Arms lower and Bushmaster upper combination had a little too much play between the upper and lower receivers for me. The slop didn’t hurt anything, but it annoyed me.
I considered putting an Accu-wedge or one of those expandable pins into the rifle but, as I examined it, I noticed that much of the looseness was attributable to side play in the pivot joint between the two receivers.
I scrounged around in my junk hardware can and found a thin flat stainless steel washer about .010 thick to use as a shim.
I pushed the pivot pin out of the lower receiver and, with a little effort, managed to wedge this shim washer into the pivot joint formed by the clevis or yoke of the lower and the lug of the upper.
I pushed the pivot pin through the washer and back into place, closed the receivers, and engaged the takedown pin.
I was very pleased to see this eliminated every bit of looseness between the two receivers and resulted in a rock solid fit while the receivers still pivot.
Just wanted to share that with you guys.

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Longbow
May 19, 2003, 02:10 AM
Thanks for sharing!

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