The Smith & Wesson M&P 5.7 22 round magazines are a standard factory replacement magazines. With durable steel construction, the M&P 5.7 magazines ensure flawless function and long-term reliability in your firearm. The magazines make for great replacements and or spare magazines for the range. Having extra spare magazines is great for those who wish to spend all day at the range but hate to reload or to have extra magazines on them for concealed carry. Whatever the reason, keeping extra magazines on hand is always a good idea. For those who are interested in picking up some extra spare magazines for theirSmith & Wesson handgun should check out the Smith & Wesson M&P series of magazines.