Be prepared for all day skirmishes by picking yourself up a spare 8 round magazine for your Smith & Wesson M&P9 paintball pistol. This magazine is specifically designed to be used in the T4E Smith & Wesson M&P9 M2.0 series .43 caliber Co2 blowback paintball pistols from Umarex. Constructed fully from metal with a high tension internal spring, this magazine can easily withstand hard drops and a high rate of fire. What differentiates this magazine from the classic version is the new and improved Quick-Piercing winding wheel which drastically cuts down the time it takes to change out Co2 cartridges. Smith & Wesson went ahead an included a spare spring for when using rubber balls as opposed to paintballs. A single 12g Co2 cartridge powers this magazine and is housed directly inside. Stock up on everything you need before your next match with this 8 round magazine option from Umarex.