Takes up any slack - UTG Pro Model 4/AR15 Receiver Wedge

My crew lead told me about these and I was putting together a bolt action 6.5 Grendel for coyote hunting so I figured I’d try it. You wouldn’t think a little piece of rubber would do that much but it really does. It’s an extremely tight fit. If you have even the slightest wobble from your upper and lower this will fix it. I stuck a micrometer on mine to measure the wobble and it was almost too small to even measure but after putting this in there it’s as solid as if it were one piece. Every bit of help improves accuracy and if you’re taking any shot at distance this will help reduce some of the variables. Some will say buy more expensive parts and they won’t have any slack… or save your money buy the reliable cheaper stuff and put this little piece in and have just as little tolerance as the more expensive. It’s worth every penny in my opinion.