Grip Frame Insert Compatible with Smith & Wesson M&P Shield Plus 9mm. Intended for use on the SHIELD PLUS frames. (typically 10 & 13 round) This unit fits in the bottom rear cavity of the M&P Shield PLUS utilizing a friction fit to secure it in the frame. This insert is designed to keep out dust and debris as well as finish off the overall look of the frame. ***NOT for: 45 ACP models, EQUALIZER, EZ FRAMES, ORIGINAL SHIELD FRAMES. SKU: PG-SPFI. Brand: Pearce. Type: Frame Insert/Plug.