Promag designed this magazine for the Smith & Wesson M&P Compact.
The maximum capacity for this magazine is (10) rounds. Will only hold 9mm Luger caliber rounds. Constructed out of steel one of the strongest metals out there, also embedded with a hi-tensile compression spring to assure you will have great exchanges between the magazine and the chamber.
One characteristic about Promags reputation is the process and dedication that goes into their manufacturing process and that has held true since their conception. This dedication to only turning up superior and dependable products for whatever occasion, has kept their integerty strong and reputation solid for many years.