Needed it for my SIG rifle because the upper and lower did not sit properly, this is my shocked face, I did have to shave a little bit off it but this little piece of rubber did the trick.

ohhunt® Rubber Accu Wedge 5 Pcs for AR15/M4/M16 Rifles - Black Red Yellow

Can't complain! These accuwedges work just as advertised. I had them within a week of ordering them.

For what it is you really can't go wrong at $1-something each here vs. $4+ each elsewhere. It's a semi-squishy chunk of plastic that takes up some slack.

Works so well. Tightens the fit between the upper and lower receivers. No more annoying knocking.

Information about my order was timely and correct. They kept me informed. Great job

They help with wiggle and play between upper and lower receiver. But doesn't eliminate all of the play/wiggle

I've used several different brands of this item. They are all about the same. They take up any slack between the upper and lower.

Great product! I love them. Highly recommend them

Worked great 👍