The buttplate catch is placed at the base of the magazine and retains the spring and buttplate. This catch is perfect for use in an emergency replacement stash and can be great to have in the spare parts chest. PRODUCT SPECIFICATIONS: Brand: Smith & Wesson Caliber: 9mm,.40 S&W Finish / Color: Black Firearm Type: Pistol Material: Polymer Models Fit: Smith & Wesson M&P Shield
