Perfect fit. - CMC Triggers Anti Walk Trigger Pin Kit For Smith & Wesson M&P 15-22 Only 91403

These pins fit perfectly. If you are using a drop in trigger for your 15-22 theses are a must. Mil-spec pins sit recessed and tend to be loose with with my drop in trigger. The polymer lower is a bit thicker so the screws on regular anti walk pins were bottoming on tbe lower receiver. Great price and perfect fit and function.