X-Grip Magazine Adapter for S&W M&P 9mm, 357 Sig, 40 S&W Full Size Magazine to fit M&P Compact Models Polymer Black

Customers generally appreciate the product for improving grip ergonomics and enabling the use of full-size magazines in compact models. While most users report a secure fit, some report that the spacer can be loose or require minor sanding to ensure proper magazine seating.