Smith & Wesson M&P 22 Compact Factory Barrel Nut Wrench

Precise fit. After buying my 22 compact I debated whether to buy this or grind down an 11 mm wrench. After making a few measurements it looked like the wrench was a little large and I might have rounded off the corners of the nut. This tool is precisely made and is a snug fit with no play on the barrel nut. No regrets on about buying this tool instead of taking a DIY approach.