Just recently I started upgrading my AR15's I have an SBA3 on the MP15-22 pistol and I just upgraded to the magpul moe stock. The main thing I noticed with both guns was the rattling it would make when you are moving with the rifle. I watched YouTube for a simple solution and while I'm sure this has probably been covered a thousand times. I found it extremely helpful go to Home Depot or any hardware store they typically have Sticky Back Velcro Strips for $3-5. I cut them length wise in half then you place one or two strips you won't be using the Velcro part you use the side that sticks to the Velcro. Remove your stock or brace. Place the strip or strips inside the top of the stock. Once you reinstall your stock you will notified a significant decrease in rattling. I just thought it was a great fix cheap fix now my both my AR'S feel secure and your still able to adjust didn't interfere whatsoever.
