The New M&P 40 Co2 Airsoft Pistol Is A Fully Licensed Smith & Wesson Airgun. Constructed With A Rugged Nylon Polymer Slide And Frame, The M&P 40 Is Extremely Resilient To Outside Damage While Still Remaining Lightweight And Easily Maneuverable. This Airgun Is Powered By A Single 12G Co2 Cartridge Which Is Housed Directly Into The 17 Round Double-Stack Magazine. The Non-Blowback Design Of This M&P 40 Is Much More Efficient.