Perfect works as described - CMC Triggers Anti Walk Trigger Pin Kit For Smith & Wesson M&P 15-22 Only 91403

Got these installed and they are great quality material. As a 15-22 lower is polymer it obviously will have lower tolerances so adding these was a great help when installing a new drop in trigger. I would highly suggest going with this product if you have a 15-22 and want to add a drop in trigger. Even if the trigger comes with anti walk pins you will want these as they are specific to the lower.