In the design of the M&P, Smith & Wesson considered the needs of military and law enforcement from every conceivable angle. No other polymer pistol offers this combination of versatility, durability, and safety. The M&P extra features include unparalleled ergonomic design, stainless steel structural components, internal lock system on select models to prevent unauthorized use, and a universal picatinny rail for laser and light mounting. The carry kits also feature a Blade-Tech Kydex Holster, a Blade-Tech Double Magazine pouch, a Maglula Upula Speed Loader, Ear Plugs, and an extra magazine. These "All-In-One" kits are designed to offer the consumer a high value package of premium quality performance accessories matched with a Smith & Wesson handgun.